<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="aspect-ratio" content="4:3">
  <title>Environmental Sinks for Waste</title>
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      background: transparent;
      color: #1e2945;
      padding: 10px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      min-height: 100%;
    }

    /* Top Navigation / Filters */
    .filter-bar {
      display: flex;
      justify-content: center;
      gap: 6px;
      flex-wrap: wrap;
    }
    .filter-btn {
      background: #f1f5f9;
      border: 1px solid #e2e8f0;
      border-radius: 20px;
      padding: 5px 12px;
      font-size: 13px;
      font-weight: 600;
      color: #475569;
      cursor: pointer;
      transition: all 0.2s ease;
    }
    .filter-btn:hover {
      background: #e2e8f0;
    }
    .filter-btn.active {
      background: #1e2945;
      color: #ffffff;
      border-color: #1e2945;
    }

    /* 3 Sinks Grid */
    .sinks-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 10px;
      align-items: stretch;
    }

    @media (max-width: 520px) {
      .sinks-grid {
        grid-template-columns: 1fr;
        gap: 10px;
      }
    }

    .sink-card {
      background: #ffffff;
      border-radius: 12px;
      border: 1.5px solid #e2e8f0;
      padding: 12px 10px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      transition: opacity 0.25s ease, transform 0.25s ease, border-color 0.25s ease;
      position: relative;
    }

    .sink-card.dimmed {
      opacity: 0.35;
    }
    .sink-card.focused {
      border-color: #0ea5e9;
      box-shadow: 0 4px 12px rgba(14, 165, 233, 0.12);
    }

    /* Card Header */
    .sink-header {
      display: flex;
      align-items: center;
      gap: 8px;
      padding-bottom: 8px;
      border-bottom: 1.5px dashed #f1f5f9;
    }

    .sink-icon {
      font-size: 20px;
      line-height: 1;
    }

    .sink-title {
      font-size: 15px;
      font-weight: 700;
      letter-spacing: -0.2px;
    }

    .sink-subtitle {
      font-size: 11px;
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      margin-left: auto;
      padding: 2px 6px;
      border-radius: 6px;
    }

    /* Water Theme */
    .card-water { border-top: 4px solid #0284c7; }
    .card-water .sink-title { color: #0284c7; }
    .card-water .sink-subtitle { background: #e0f2fe; color: #0369a1; }
    .card-water .pill { background: #f0f9ff; border: 1px solid #bae6fd; color: #0369a1; }
    .card-water .pill:hover { background: #e0f2fe; }

    /* Air Theme */
    .card-air { border-top: 4px solid #64748b; }
    .card-air .sink-title { color: #475569; }
    .card-air .sink-subtitle { background: #f1f5f9; color: #334155; }
    .card-air .pill { background: #f8fafc; border: 1px solid #cbd5e1; color: #334155; }
    .card-air .pill:hover { background: #f1f5f9; }

    /* Land Theme */
    .card-land { border-top: 4px solid #b45309; }
    .card-land .sink-title { color: #b45309; }
    .card-land .sink-subtitle { background: #fef3c7; color: #92400e; }
    .card-land .pill { background: #fffbeb; border: 1px solid #fde68a; color: #92400e; }
    .card-land .pill:hover { background: #fef3c7; }

    /* Pollutant Pills List */
    .pollutants-list {
      display: flex;
      flex-direction: column;
      gap: 6px;
      flex-grow: 1;
    }

    .pill {
      font-size: 12.5px;
      font-weight: 600;
      padding: 6px 9px;
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 6px;
      line-height: 1.3;
    }

    .chem-tag {
      font-size: 11px;
      font-weight: 700;
      opacity: 0.8;
      background: rgba(255, 255, 255, 0.7);
      padding: 1px 5px;
      border-radius: 4px;
      white-space: nowrap;
    }
  </style>
</head>
<body>

  
  <div class="filter-bar">
    <button class="filter-btn active" onclick="filterSink('all')">All Sinks</button>
    <button class="filter-btn" onclick="filterSink('water')">💧 Water</button>
    <button class="filter-btn" onclick="filterSink('air')">💨 Air</button>
    <button class="filter-btn" onclick="filterSink('land')">🌱 Land</button>
  </div>

  
  <div class="sinks-grid">
    
    
    <div class="sink-card card-water" id="card-water">
      <div class="sink-header">
        <span class="sink-icon">💧</span>
        <span class="sink-title">Water</span>
        <span class="sink-subtitle">Aquatic</span>
      </div>
      <div class="pollutants-list">
        <div class="pill">
          <span>Sewage & Waste</span>
          <span class="chem-tag">Microbes</span>
        </div>
        <div class="pill">
          <span>Fertilizers (Run-off)</span>
          <span class="chem-tag">Nitrates</span>
        </div>
        <div class="pill">
          <span>Toxic Chemicals</span>
          <span class="chem-tag">Effluent</span>
        </div>
      </div>
    </div>

    
    <div class="sink-card card-air" id="card-air">
      <div class="sink-header">
        <span class="sink-icon">💨</span>
        <span class="sink-title">Air</span>
        <span class="sink-subtitle">Atmosphere</span>
      </div>
      <div class="pollutants-list">
        <div class="pill">
          <span>Smoke & Soot</span>
          <span class="chem-tag">PM₂.₅</span>
        </div>
        <div class="pill">
          <span>Sulfur Dioxide</span>
          <span class="chem-tag">SO₂</span>
        </div>
        <div class="pill">
          <span>Nitrogen Oxides</span>
          <span class="chem-tag">NOₓ</span>
        </div>
        <div class="pill">
          <span>Carbon Dioxide</span>
          <span class="chem-tag">CO₂</span>
        </div>
      </div>
    </div>

    
    <div class="sink-card card-land" id="card-land">
      <div class="sink-header">
        <span class="sink-icon">🌱</span>
        <span class="sink-title">Land</span>
        <span class="sink-subtitle">Terrestrial</span>
      </div>
      <div class="pollutants-list">
        <div class="pill">
          <span>Toxic Farming Chemicals</span>
          <span class="chem-tag">Pesticides</span>
        </div>
        <div class="pill">
          <span>Herbicides & Biocides</span>
          <span class="chem-tag">Toxins</span>
        </div>
        <div class="pill">
          <span>Landfill Waste</span>
          <span class="chem-tag">Refuse</span>
        </div>
      </div>
    </div>

  </div>

  <script>
    function filterSink(type) {
      const buttons = document.querySelectorAll('.filter-btn');
      buttons.forEach(btn => btn.classList.remove('active'));
      
      const cards = {
        water: document.getElementById('card-water'),
        air: document.getElementById('card-air'),
        land: document.getElementById('card-land')
      };

      if (type === 'all') {
        buttons[0].classList.add('active');
        Object.values(cards).forEach(c => {
          c.classList.remove('dimmed', 'focused');
        });
      } else {
        const btnIndex = type === 'water' ? 1 : type === 'air' ? 2 : 3;
        buttons[btnIndex].classList.add('active');

        Object.keys(cards).forEach(key => {
          if (key === type) {
            cards[key].classList.remove('dimmed');
            cards[key].classList.add('focused');
          } else {
            cards[key].classList.add('dimmed');
            cards[key].classList.remove('focused');
          }
        });
      }
    }
  </script>
</body>
</html>

Waste Management and the Consequences of Human Population Growth

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>River Basin Pollution Sources</title>
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      width: 100%;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
      background: transparent;
      color: #1e293b;
      display: flex;
      flex-direction: column;
      align-items: center;
      padding: 6px 4px;
      user-select: none;
      -webkit-user-select: none;
    }

    .container {
      width: 100%;
      max-width: 680px;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 8px;
    }

    /* Interactive Filters / Tabs */
    .toolbar {
      display: flex;
      gap: 6px;
      width: 100%;
      justify-content: center;
      flex-wrap: wrap;
    }

    .tab-btn {
      padding: 6px 12px;
      font-size: 13px;
      font-weight: 600;
      border: 1.5px solid #cbd5e1;
      border-radius: 20px;
      background: #f8fafc;
      color: #475569;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      gap: 5px;
      transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
      line-height: 1.2;
    }

    .tab-btn:hover {
      background: #e2e8f0;
      color: #0f172a;
    }

    .tab-btn.active {
      background: #0284c7;
      color: #ffffff;
      border-color: #0284c7;
      box-shadow: 0 2px 5px rgba(2, 132, 199, 0.25);
    }

    /* Diagram SVG Container */
    .diagram-wrap {
      width: 100%;
      position: relative;
      border-radius: 8px;
      overflow: hidden;
      background: #f0f9ff;
    }

    svg {
      width: 100%;
      height: auto;
      display: block;
    }

    .source-group {
      cursor: pointer;
      transition: opacity 0.3s ease;
    }

    .source-group:hover rect.zone-bg {
      filter: brightness(0.95);
    }

    .source-group.dimmed {
      opacity: 0.22;
    }

    /* Smooth continuous flow animations */
    @keyframes riverFlow {
      0% { stroke-dashoffset: 32; }
      100% { stroke-dashoffset: 0; }
    }

    .flow-line {
      stroke-dasharray: 8 6;
      animation: riverFlow 2.8s linear infinite;
    }

    .river-stream-line {
      stroke-dasharray: 12 8;
      animation: riverFlow 3.5s linear infinite;
    }

    /* Responsive HTML Impact Indicator Cards */
    .cards-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 6px;
      width: 100%;
    }

    .info-card {
      background: #ffffff;
      border: 1.5px solid #e2e8f0;
      border-radius: 8px;
      padding: 8px 10px;
      display: flex;
      flex-direction: column;
      gap: 3px;
      cursor: pointer;
      transition: border-color 0.2s ease, background-color 0.2s ease, box-shadow 0.2s ease;
    }

    .info-card:hover {
      background: #f8fafc;
    }

    .info-card.active {
      border-color: currentColor;
      background: #ffffff;
      box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
    }

    .info-card.dimmed {
      opacity: 0.45;
    }

    .card-title {
      font-size: 13px;
      font-weight: 700;
      display: flex;
      align-items: center;
      gap: 4px;
    }

    .card-subtext {
      font-size: 11.5px;
      color: #475569;
      line-height: 1.25;
      font-weight: 500;
    }

    .badge-tag {
      margin-top: 2px;
      display: inline-block;
      align-self: flex-start;
      font-size: 10.5px;
      font-weight: 700;
      padding: 2px 6px;
      border-radius: 4px;
      line-height: 1.2;
    }

    /* Card Color Schemes */
    .card-agri {
      color: #15803d;
    }
    .card-agri .badge-tag {
      background: #dcfce7;
      color: #166534;
      border: 1px solid #bbf7d0;
    }

    .card-sewage {
      color: #92400e;
    }
    .card-sewage .badge-tag {
      background: #fef3c7;
      color: #92400e;
      border: 1px solid #fde68a;
    }

    .card-ind {
      color: #7e22ce;
    }
    .card-ind .badge-tag {
      background: #f3e8ff;
      color: #6b21a8;
      border: 1px solid #e9d5ff;
    }

    /* Status Banner */
    .status-summary {
      width: 100%;
      background: #ffffff;
      border: 1.5px solid #cbd5e1;
      border-radius: 6px;
      padding: 7px 12px;
      font-size: 12.5px;
      font-weight: 600;
      color: #334155;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      text-align: center;
      box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
    }

    .status-dot {
      width: 10px;
      height: 10px;
      min-width: 10px;
      border-radius: 50%;
      background: #0284c7;
      transition: background-color 0.25s ease;
    }

    /* Mobile adjustments down to 350px */
    @media (max-width: 520px) {
      .tab-btn {
        padding: 5px 9px;
        font-size: 11.5px;
      }
      .cards-grid {
        grid-template-columns: 1fr;
        gap: 5px;
      }
      .info-card {
        padding: 6px 10px;
        display: grid;
        grid-template-columns: auto 1fr auto;
        align-items: center;
        gap: 8px;
      }
      .card-title {
        font-size: 12.5px;
      }
      .card-subtext {
        font-size: 11px;
      }
      .badge-tag {
        margin-top: 0;
        align-self: center;
        font-size: 10px;
      }
      .status-summary {
        font-size: 11.5px;
        padding: 6px 8px;
      }
    }
  </style>
</head>
<body>

  <div class="container">
    
    <div class="toolbar" role="tablist">
      <button class="tab-btn active" id="btn-all" onclick="selectSource('all')">All Sources</button>
      <button class="tab-btn" id="btn-agri" onclick="selectSource('agri')">🌾 Agriculture</button>
      <button class="tab-btn" id="btn-sewage" onclick="selectSource('sewage')">🚽 Sewage Outflow</button>
      <button class="tab-btn" id="btn-ind" onclick="selectSource('ind')">🏭 Industry</button>
    </div>

    
    <div class="diagram-wrap">
      <svg viewBox="0 0 700 370" xmlns="http://www.w3.org/2000/svg" aria-label="River basin cross-section diagram">
        <defs>
          
          <linearGradient id="skyGrad" x1="0" y1="0" x2="0" y2="1">
            <stop offset="0%" stop-color="#f0f9ff"/>
            <stop offset="100%" stop-color="#e0f2fe"/>
          </linearGradient>

          <linearGradient id="fieldGrad" x1="0" y1="0" x2="0" y2="1">
            <stop offset="0%" stop-color="#86efac"/>
            <stop offset="100%" stop-color="#4ade80"/>
          </linearGradient>

          <linearGradient id="riverGrad" x1="0" y1="0" x2="0" y2="1">
            <stop offset="0%" stop-color="#0284c7"/>
            <stop offset="100%" stop-color="#0369a1"/>
          </linearGradient>

          <linearGradient id="plumeAgri" x1="0" y1="0" x2="0" y2="1">
            <stop offset="0%" stop-color="#16a34a" stop-opacity="0.85"/>
            <stop offset="100%" stop-color="#0284c7" stop-opacity="0.1"/>
          </linearGradient>

          <linearGradient id="plumeSewage" x1="0" y1="0" x2="0" y2="1">
            <stop offset="0%" stop-color="#92400e" stop-opacity="0.9"/>
            <stop offset="100%" stop-color="#0369a1" stop-opacity="0.15"/>
          </linearGradient>

          <linearGradient id="plumeInd" x1="0" y1="0" x2="0" y2="1">
            <stop offset="0%" stop-color="#9333ea" stop-opacity="0.9"/>
            <stop offset="100%" stop-color="#0369a1" stop-opacity="0.15"/>
          </linearGradient>

          
          <marker id="arrow-agri" viewBox="0 0 10 10" refX="6" refY="5" markerWidth="6" markerHeight="6" orient="auto-start-reverse">
            <path d="M 0 1.5 L 8 5 L 0 8.5 z" fill="#15803d"/>
          </marker>
          <marker id="arrow-sewage" viewBox="0 0 10 10" refX="6" refY="5" markerWidth="6" markerHeight="6" orient="auto-start-reverse">
            <path d="M 0 1.5 L 8 5 L 0 8.5 z" fill="#92400e"/>
          </marker>
          <marker id="arrow-ind" viewBox="0 0 10 10" refX="6" refY="5" markerWidth="6" markerHeight="6" orient="auto-start-reverse">
            <path d="M 0 1.5 L 8 5 L 0 8.5 z" fill="#7e22ce"/>
          </marker>
        </defs>

        
        <rect x="0" y="0" width="700" height="210" fill="url(#skyGrad)"/>

        
        <path d="M 0 200 Q 350 185 700 200 L 700 370 L 0 370 Z" fill="url(#riverGrad)"/>
        
        <path d="M 0 205 Q 350 190 700 205" stroke="#7dd3fc" stroke-width="2.5" fill="none" opacity="0.8"/>

        
        <g id="grp-agri" class="source-group" onclick="selectSource('agri')">
          
          <path d="M 0 95 Q 110 80 220 205 L 0 205 Z" fill="url(#fieldGrad)"/>
          
          <path d="M 15 125 L 135 205" stroke="#15803d" stroke-width="2" stroke-dasharray="5 4" opacity="0.45"/>
          <path d="M 45 115 L 170 205" stroke="#15803d" stroke-width="2" stroke-dasharray="5 4" opacity="0.45"/>
          <path d="M 80 105 L 205 205" stroke="#15803d" stroke-width="2" stroke-dasharray="5 4" opacity="0.45"/>

          
          <text x="50" y="95" font-size="28">🌾</text>
          <text x="110" y="125" font-size="22">🌱</text>
          <text x="25" y="145" font-size="20">🚜</text>

          
          <rect class="zone-bg" x="12" y="14" width="200" height="42" rx="6" fill="#ffffff" stroke="#16a34a" stroke-width="2"/>
          <text x="112" y="32" text-anchor="middle" font-size="14" font-weight="bold" fill="#15803d">Agricultural Fields</text>
          <text x="112" y="47" text-anchor="middle" font-size="11" font-weight="600" fill="#475569">Nitrates &amp; Phosphates</text>

          
          <path d="M 105 145 L 125 215" stroke="#15803d" stroke-width="3.5" fill="none" class="flow-line" marker-end="url(#arrow-agri)"/>
          <path d="M 60 165 L 80 215" stroke="#15803d" stroke-width="3.5" fill="none" class="flow-line" marker-end="url(#arrow-agri)"/>

          
          <ellipse cx="115" cy="265" rx="85" ry="38" fill="url(#plumeAgri)"/>

          
          <rect x="30" y="252" width="170" height="26" rx="13" fill="#064e3b" stroke="#34d399" stroke-width="1.5"/>
          <text x="115" y="269" text-anchor="middle" font-size="12" font-weight="bold" fill="#ffffff">Algal Bloom &amp; Eutrophication</text>
        </g>

        
        <g id="grp-sewage" class="source-group" onclick="selectSource('sewage')">
          
          <path d="M 215 205 Q 350 145 485 205 Z" fill="#cbd5e1"/>

          
          <text x="320" y="125" font-size="30">🏘️</text>

          
          <rect x="333" y="160" width="34" height="48" fill="#64748b" rx="3"/>
          <ellipse cx="350" cy="208" rx="17" ry="7" fill="#334155"/>
          <ellipse cx="350" cy="208" rx="12" ry="4.5" fill="#78350f"/>

          
          <rect class="zone-bg" x="250" y="14" width="200" height="42" rx="6" fill="#ffffff" stroke="#92400e" stroke-width="2"/>
          <text x="350" y="32" text-anchor="middle" font-size="14" font-weight="bold" fill="#92400e">Untreated Sewage</text>
          <text x="350" y="47" text-anchor="middle" font-size="11" font-weight="600" fill="#475569">Organic Waste Outflow</text>

          
          <path d="M 350 212 L 350 248" stroke="#92400e" stroke-width="4.5" fill="none" class="flow-line" marker-end="url(#arrow-sewage)"/>

          
          <ellipse cx="350" cy="275" rx="88" ry="40" fill="url(#plumeSewage)"/>

          
          <rect x="260" y="252" width="180" height="26" rx="13" fill="#451a03" stroke="#f59e0b" stroke-width="1.5"/>
          <text x="350" y="269" text-anchor="middle" font-size="12" font-weight="bold" fill="#ffffff">Decomposition &amp; O₂ Depletion</text>
        </g>

        
        <g id="grp-ind" class="source-group" onclick="selectSource('ind')">
          
          <path d="M 480 205 Q 590 90 700 105 L 700 205 Z" fill="#94a3b8"/>

          
          <rect x="545" y="115" width="48" height="55" fill="#475569" rx="2"/>
          <rect x="600" y="100" width="45" height="70" fill="#334155" rx="2"/>
          
          <rect x="610" y="70" width="10" height="30" fill="#1e293b"/>
          <rect x="626" y="80" width="10" height="20" fill="#1e293b"/>
          <text x="606" y="65" font-size="20">💨</text>
          <text x="550" y="110" font-size="22">🏭</text>

          
          <rect class="zone-bg" x="488" y="14" width="200" height="42" rx="6" fill="#ffffff" stroke="#7e22ce" stroke-width="2"/>
          <text x="588" y="32" text-anchor="middle" font-size="14" font-weight="bold" fill="#7e22ce">Industrial Effluent</text>
          <text x="588" y="47" text-anchor="middle" font-size="11" font-weight="600" fill="#475569">Heavy Metals &amp; Toxins</text>

          
          <path d="M 570 170 L 555 218" stroke="#7e22ce" stroke-width="3.5" fill="none" class="flow-line" marker-end="url(#arrow-ind)"/>
          <path d="M 620 170 L 600 218" stroke="#7e22ce" stroke-width="3.5" fill="none" class="flow-line" marker-end="url(#arrow-ind)"/>

          
          <ellipse cx="585" cy="265" rx="85" ry="38" fill="url(#plumeInd)"/>

          
          <rect x="500" y="252" width="170" height="26" rx="13" fill="#4c1d95" stroke="#c084fc" stroke-width="1.5"/>
          <text x="585" y="269" text-anchor="middle" font-size="12" font-weight="bold" fill="#ffffff">Toxics &amp; Bioaccumulation</text>
        </g>

        
        <g id="flow-indicator">
          <rect x="190" y="328" width="320" height="28" rx="14" fill="#082f49" opacity="0.85"/>
          <path d="M 210 342 L 490 342" stroke="#38bdf8" stroke-width="2" class="river-stream-line"/>
          <text x="350" y="346" text-anchor="middle" font-size="12" font-weight="bold" fill="#ffffff" letter-spacing="2">RIVER FLOW DIRECTION →</text>
        </g>
      </svg>
    </div>

    
    <div class="cards-grid">
      <div class="info-card card-agri" id="card-agri" onclick="selectSource('agri')">
        <div class="card-title">🌾 Agriculture</div>
        <div class="card-subtext">Fertilizer runoff (nitrates &amp; phosphates) causing eutrophication</div>
        <span class="badge-tag">Excess Nutrients</span>
      </div>

      <div class="info-card card-sewage" id="card-sewage" onclick="selectSource('sewage')">
        <div class="card-title">🚽 Sewage Outflow</div>
        <div class="card-subtext">Organic matter decomposed by bacteria, depleting dissolved O₂</div>
        <span class="badge-tag">Pathogens &amp; Low O₂</span>
      </div>

      <div class="info-card card-ind" id="card-ind" onclick="selectSource('ind')">
        <div class="card-title">🏭 Industrial Plant</div>
        <div class="card-subtext">Heavy metals and synthetic chemicals that persist in food chains</div>
        <span class="badge-tag">Bioaccumulation Risk</span>
      </div>
    </div>

    
    <div class="status-summary" id="statusSummary">
      <div class="status-dot" id="statusDot"></div>
      <span id="statusText">Click any source above to isolate its pathway and impact on the river ecosystem.</span>
    </div>
  </div>

  <script>
    const sourceData = {
      all: {
        text: "Human activities introduce multiple distinct pollutants into the river basin concurrently.",
        color: "#0284c7"
      },
      agri: {
        text: "Agricultural runoff supplies excess N & P, triggering rapid algal blooms and subsequent dead zones.",
        color: "#16a34a"
      },
      sewage: {
        text: "Raw sewage introduces harmful pathogens and fuels aerobic decay that strips oxygen from water.",
        color: "#92400e"
      },
      ind: {
        text: "Industrial discharge carries non-biodegradable toxins and metals that bioaccumulate up the food web.",
        color: "#7e22ce"
      }
    };

    function selectSource(key) {
      // Update Tab Buttons
      document.querySelectorAll('.tab-btn').forEach(btn => {
        btn.classList.toggle('active', btn.id === 'btn-' + key);
      });

      // Update Diagram SVG Groups
      const groups = ['agri', 'sewage', 'ind'];
      groups.forEach(g => {
        const svgEl = document.getElementById('grp-' + g);
        const cardEl = document.getElementById('card-' + g);
        if (svgEl) {
          if (key === 'all' || key === g) {
            svgEl.classList.remove('dimmed');
          } else {
            svgEl.classList.add('dimmed');
          }
        }
        if (cardEl) {
          if (key === 'all') {
            cardEl.classList.remove('active', 'dimmed');
          } else if (key === g) {
            cardEl.classList.add('active');
            cardEl.classList.remove('dimmed');
          } else {
            cardEl.classList.remove('active');
            cardEl.classList.add('dimmed');
          }
        }
      });

      // Update Status Text & Dot Indicator
      const info = sourceData[key] || sourceData.all;
      const statusText = document.getElementById('statusText');
      const statusDot = document.getElementById('statusDot');
      if (statusText && statusDot) {
        statusText.textContent = info.text;
        statusDot.style.backgroundColor = info.color;
      }
    }
  </script>
</body>
</html>

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="aspect-ratio" content="4:3">
  <style>
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: system-ui, -apple-system, sans-serif;
      background: #f8fafc;
      color: #1e293b;
      display: flex;
      flex-direction: column;
      align-items: center;
      padding: 8px;
      user-select: none;
    }
    .diagram-wrap {
      width: 100%;
      max-width: 480px;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .stepper-nav {
      display: flex;
      gap: 6px;
      width: 100%;
    }
    .step-btn {
      flex: 1;
      padding: 6px 4px;
      font-size: 13px;
      font-weight: 600;
      background: #ffffff;
      border: 1px solid #cbd5e1;
      border-radius: 6px;
      color: #64748b;
      cursor: pointer;
      text-align: center;
      transition: all 0.25s ease;
    }
    .step-btn.active {
      background: #0284c7;
      border-color: #0284c7;
      color: #ffffff;
      box-shadow: 0 2px 4px rgba(2, 132, 199, 0.25);
    }
    .stage-container {
      position: relative;
      width: 100%;
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: 10px;
      overflow: hidden;
    }
    svg {
      width: 100%;
      height: auto;
      display: block;
    }

    /* Dynamic SVG state animations */
    .fade-el {
      transition: opacity 0.4s ease, transform 0.4s ease;
    }
    .hidden {
      opacity: 0;
      pointer-events: none;
    }
    .visible {
      opacity: 1;
    }

    /* Smoke particles animation */
    @keyframes riseFumes {
      0% { transform: translate(0, 0) scale(0.7); opacity: 0.8; }
      50% { transform: translate(25px, -35px) scale(1.1); opacity: 0.9; }
      100% { transform: translate(65px, -75px) scale(1.4); opacity: 0; }
    }
    .smoke-particle {
      animation: riseFumes 2.5s infinite ease-out;
      transform-origin: center;
    }
    .smoke-p2 { animation-delay: 0.8s; }
    .smoke-p3 { animation-delay: 1.6s; }

    /* Rain animation */
    @keyframes rainFall {
      0% { transform: translateY(-10px); opacity: 0; }
      30% { opacity: 1; }
      100% { transform: translateY(60px); opacity: 0; }
    }
    .rain-drop {
      animation: rainFall 1.2s infinite linear;
    }
    .rain-d2 { animation-delay: 0.3s; }
    .rain-d3 { animation-delay: 0.6s; }
    .rain-d4 { animation-delay: 0.9s; }

    .ctrl-bar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 4px;
    }
    .play-btn {
      background: #f1f5f9;
      border: 1px solid #cbd5e1;
      border-radius: 6px;
      padding: 4px 10px;
      font-size: 13px;
      font-weight: 600;
      color: #334155;
      cursor: pointer;
      display: flex;
      align-items: center;
      gap: 4px;
    }
    .dots {
      display: flex;
      gap: 6px;
    }
    .dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: #cbd5e1;
      cursor: pointer;
      transition: background 0.2s;
    }
    .dot.active {
      background: #0284c7;
    }
  </style>
</head>
<body>

<div class="diagram-wrap">
  
  <div class="stepper-nav">
    <button class="step-btn active" id="btn-0" onclick="setStep(0)">1. Emissions</button>
    <button class="step-btn" id="btn-1" onclick="setStep(1)">2. Acid Clouds</button>
    <button class="step-btn" id="btn-2" onclick="setStep(2)">3. Acid Rain</button>
  </div>

  
  <div class="stage-container">
    <svg viewBox="0 0 400 270">
      <defs>
        
        <linearGradient id="skyStep1" x1="0" y1="0" x2="0" y2="1">
          <stop offset="0%" stop-color="#e0f2fe"/>
          <stop offset="100%" stop-color="#f8fafc"/>
        </linearGradient>
        <linearGradient id="cloudAcid" x1="0" y1="0" x2="0" y2="1">
          <stop offset="0%" stop-color="#fef08a"/>
          <stop offset="100%" stop-color="#fef9c3"/>
        </linearGradient>
      </defs>

      
      <rect width="400" height="270" fill="url(#skyStep1)"/>

      
      <path d="M 0,225 Q 90,215 160,230 T 400,220 L 400,270 L 0,270 Z" fill="#94a3b8" opacity="0.3"/>
      
      <path d="M 210,240 Q 280,185 400,195 L 400,270 L 210,270 Z" fill="#cbd5e1"/>

      
      <ellipse cx="320" cy="245" rx="65" ry="18" id="lake-water" fill="#38bdf8" transition="fill 0.4s"/>

      
      
      <g id="factory">
        
        <rect x="25" y="180" width="60" height="50" fill="#475569" rx="2"/>
        <polygon points="25,180 55,160 85,180" fill="#334155"/>
        
        <path d="M 90,230 L 96,165 L 114,165 L 120,230 Z" fill="#64748b"/>
        <ellipse cx="105" cy="165" rx="9" ry="3" fill="#475569"/>
        
        
        <rect x="135" y="218" width="34" height="12" fill="#3b82f6" rx="3"/>
        <rect x="142" y="210" width="20" height="10" fill="#93c5fd" rx="2"/>
        <circle cx="143" cy="230" r="4.5" fill="#1e293b"/>
        <circle cx="161" cy="230" r="4.5" fill="#1e293b"/>

        
        <line x1="0" y1="234" x2="190" y2="234" stroke="#475569" stroke-width="4"/>
      </g>

      
      <g id="emission-fumes">
        
        <g transform="translate(105, 160)">
          <circle class="smoke-particle" cx="0" cy="0" r="10" fill="#ea580c" opacity="0.6"/>
          <circle class="smoke-particle smoke-p2" cx="0" cy="0" r="12" fill="#dc2626" opacity="0.5"/>
          <circle class="smoke-particle smoke-p3" cx="0" cy="0" r="14" fill="#64748b" opacity="0.7"/>
        </g>
        
        <g transform="translate(130, 222)">
          <circle class="smoke-particle" cx="0" cy="0" r="5" fill="#ea580c" opacity="0.5"/>
          <circle class="smoke-particle smoke-p2" cx="0" cy="0" r="6" fill="#475569" opacity="0.6"/>
        </g>
      </g>

      
      <g id="gas-flow-arrow" class="fade-el visible">
        <path d="M 120,150 Q 160,110 200,90" fill="none" stroke="#ea580c" stroke-width="2.5" stroke-dasharray="5,4"/>
        <polygon points="200,85 208,92 198,96" fill="#ea580c"/>
      </g>

      
      <g id="badge-step1" class="fade-el visible">
        <rect x="40" y="115" width="105" height="28" rx="6" fill="#ffffff" stroke="#ea580c" stroke-width="1.5"/>
        <text x="92" y="133" text-anchor="middle" font-size="13" font-weight="700" fill="#c2410c">SO₂ + NOₓ + Soot</text>
      </g>

      
      
      <g id="clouds" transform="translate(190, 30)">
        
        <path id="cloud-body" d="M 40,55 A 25,25 0 0,1 80,35 A 35,35 0 0,1 140,40 A 25,25 0 0,1 170,60 A 20,20 0 0,1 150,85 L 40,85 A 20,20 0 0,1 40,55 Z" 
              fill="#e2e8f0" stroke="#cbd5e1" stroke-width="1.5" transition="fill 0.4s, stroke 0.4s"/>
      </g>

      
      <g id="badge-step2" class="fade-el hidden" transform="translate(195, 20)">
        <rect x="0" y="0" width="185" height="30" rx="6" fill="#ffffff" stroke="#ca8a04" stroke-width="1.5"/>
        <text x="92" y="20" text-anchor="middle" font-size="13" font-weight="700" fill="#a16207">SO₂ + H₂O → H₂SO₄</text>
      </g>

      
      
      <g id="acid-rain-group" class="fade-el hidden">
        
        <g stroke="#ca8a04" stroke-width="2.5" stroke-linecap="round">
          <line class="rain-drop" x1="240" y1="120" x2="235" y2="135"/>
          <line class="rain-drop rain-d2" x1="265" y1="115" x2="260" y2="130"/>
          <line class="rain-drop rain-d3" x1="290" y1="125" x2="285" y2="140"/>
          <line class="rain-drop rain-d4" x1="315" y1="118" x2="310" y2="133"/>
          <line class="rain-drop rain-d2" x1="340" y1="122" x2="335" y2="137"/>
          <line class="rain-drop rain-d3" x1="365" y1="120" x2="360" y2="135"/>
        </g>
      </g>

      
      <g id="healthy-trees" class="fade-el visible">
        
        <rect x="238" y="195" width="4" height="20" fill="#78350f"/>
        <polygon points="240,165 228,198 252,198" fill="#16a34a"/>
        
        <rect x="268" y="180" width="5" height="24" fill="#78350f"/>
        <polygon points="270,145 254,185 286,185" fill="#15803d"/>
        
        <rect x="375" y="175" width="4" height="22" fill="#78350f"/>
        <polygon points="377,150 363,180 391,180" fill="#16a34a"/>
      </g>

      
      <g id="damaged-trees" class="fade-el hidden">
        
        <rect x="238" y="195" width="4" height="20" fill="#78350f"/>
        <line x1="240" y1="175" x2="230" y2="168" stroke="#78350f" stroke-width="2.5"/>
        <line x1="240" y1="185" x2="250" y2="178" stroke="#78350f" stroke-width="2.5"/>
        <line x1="240" y1="168" x2="240" y2="195" stroke="#78350f" stroke-width="3"/>
        <polygon points="240,172 232,190 248,190" fill="#a16207" opacity="0.7"/>

        
        <rect x="268" y="180" width="5" height="24" fill="#78350f"/>
        <line x1="270" y1="155" x2="255" y2="148" stroke="#78350f" stroke-width="2.5"/>
        <line x1="270" y1="165" x2="283" y2="158" stroke="#78350f" stroke-width="2.5"/>
        <line x1="270" y1="148" x2="270" y2="180" stroke="#78350f" stroke-width="3"/>
        <polygon points="270,158 258,178 282,178" fill="#ca8a04" opacity="0.6"/>

        
        <rect x="375" y="175" width="4" height="22" fill="#78350f"/>
        <line x1="377" y1="152" x2="377" y2="175" stroke="#78350f" stroke-width="2.5"/>
        <line x1="377" y1="160" x2="368" y2="155" stroke="#78350f" stroke-width="2"/>
        <line x1="377" y1="166" x2="385" y2="162" stroke="#78350f" stroke-width="2"/>
      </g>

      
      <g id="healthy-lake" class="fade-el visible">
        <text x="315" y="248" font-size="14">🐟</text>
        <text x="338" y="252" font-size="11">🐟</text>
      </g>

      
      <g id="damaged-lake" class="fade-el hidden">
        
        <g transform="translate(305, 238) scale(1, -1)">
          <text x="0" y="0" font-size="14">🐟</text>
        </g>
        <g transform="translate(335, 244) scale(1, -1)">
          <text x="0" y="0" font-size="12">🐟</text>
        </g>
        
        <rect x="278" y="254" width="85" height="15" rx="3" fill="#ffffff" opacity="0.95"/>
        <text x="320" y="265" text-anchor="middle" font-size="10" font-weight="700" fill="#dc2626">Acidified Lake</text>
      </g>

      
      <g id="badge-step3" class="fade-el hidden">
        <rect x="235" y="90" width="135" height="22" rx="4" fill="#dc2626"/>
        <text x="302" y="105" text-anchor="middle" font-size="11" font-weight="700" fill="#ffffff">Damaged Ecosystem</text>
      </g>
    </svg>
  </div>

  
  <div class="ctrl-bar">
    <button class="play-btn" id="toggle-play" onclick="toggleAutoPlay()">
      <span id="play-icon">⏸</span> <span id="play-text">Pause</span>
    </button>
    <div class="dots">
      <div class="dot active" id="dot-0" onclick="setStep(0)"></div>
      <div class="dot" id="dot-1" onclick="setStep(1)"></div>
      <div class="dot" id="dot-2" onclick="setStep(2)"></div>
    </div>
  </div>
</div>

<script>
  let currentStep = 0;
  let isPlaying = true;
  let timer = null;

  function updateVisuals(step) {
    // Nav buttons & dots
    for (let i = 0; i < 3; i++) {
      document.getElementById(`btn-${i}`).classList.toggle('active', i === step);
      document.getElementById(`dot-${i}`).classList.toggle('active', i === step);
    }

    // Elements
    const badge1 = document.getElementById('badge-step1');
    const badge2 = document.getElementById('badge-step2');
    const badge3 = document.getElementById('badge-step3');
    const gasArrow = document.getElementById('gas-flow-arrow');
    const cloudBody = document.getElementById('cloud-body');
    const acidRain = document.getElementById('acid-rain-group');
    const healthyTrees = document.getElementById('healthy-trees');
    const damagedTrees = document.getElementById('damaged-trees');
    const healthyLake = document.getElementById('healthy-lake');
    const damagedLake = document.getElementById('damaged-lake');
    const lakeWater = document.getElementById('lake-water');

    if (step === 0) {
      // Step 1: Emissions
      badge1.setAttribute('class', 'fade-el visible');
      badge2.setAttribute('class', 'fade-el hidden');
      badge3.setAttribute('class', 'fade-el hidden');
      gasArrow.setAttribute('class', 'fade-el visible');
      cloudBody.setAttribute('fill', '#e2e8f0');
      cloudBody.setAttribute('stroke', '#cbd5e1');
      acidRain.setAttribute('class', 'fade-el hidden');
      healthyTrees.setAttribute('class', 'fade-el visible');
      damagedTrees.setAttribute('class', 'fade-el hidden');
      healthyLake.setAttribute('class', 'fade-el visible');
      damagedLake.setAttribute('class', 'fade-el hidden');
      lakeWater.setAttribute('fill', '#38bdf8');
    } else if (step === 1) {
      // Step 2: Reaction in clouds
      badge1.setAttribute('class', 'fade-el hidden');
      badge2.setAttribute('class', 'fade-el visible');
      badge3.setAttribute('class', 'fade-el hidden');
      gasArrow.setAttribute('class', 'fade-el visible');
      cloudBody.setAttribute('fill', 'url(#cloudAcid)');
      cloudBody.setAttribute('stroke', '#ca8a04');
      acidRain.setAttribute('class', 'fade-el hidden');
      healthyTrees.setAttribute('class', 'fade-el visible');
      damagedTrees.setAttribute('class', 'fade-el hidden');
      healthyLake.setAttribute('class', 'fade-el visible');
      damagedLake.setAttribute('class', 'fade-el hidden');
      lakeWater.setAttribute('fill', '#38bdf8');
    } else if (step === 2) {
      // Step 3: Acid Rain & Damage
      badge1.setAttribute('class', 'fade-el hidden');
      badge2.setAttribute('class', 'fade-el visible');
      badge3.setAttribute('class', 'fade-el visible');
      gasArrow.setAttribute('class', 'fade-el hidden');
      cloudBody.setAttribute('fill', 'url(#cloudAcid)');
      cloudBody.setAttribute('stroke', '#ca8a04');
      acidRain.setAttribute('class', 'fade-el visible');
      healthyTrees.setAttribute('class', 'fade-el hidden');
      damagedTrees.setAttribute('class', 'fade-el visible');
      healthyLake.setAttribute('class', 'fade-el hidden');
      damagedLake.setAttribute('class', 'fade-el visible');
      lakeWater.setAttribute('fill', '#94a3b8');
    }
  }

  function setStep(idx) {
    currentStep = idx;
    updateVisuals(currentStep);
    if (isPlaying) {
      restartTimer();
    }
  }

  function nextStep() {
    currentStep = (currentStep + 1) % 3;
    updateVisuals(currentStep);
  }

  function restartTimer() {
    clearInterval(timer);
    timer = setInterval(nextStep, 3500);
  }

  function toggleAutoPlay() {
    isPlaying = !isPlaying;
    const icon = document.getElementById('play-icon');
    const text = document.getElementById('play-text');
    if (isPlaying) {
      icon.textContent = '⏸';
      text.textContent = 'Pause';
      restartTimer();
    } else {
      icon.textContent = '▶';
      text.textContent = 'Play';
      clearInterval(timer);
    }
  }

  // Initialize
  updateVisuals(0);
  restartTimer();
</script>

</body>
</html>

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="aspect-ratio" content="4:3">
  <title>Land Pollution Cutaway</title>
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      color: #1e2945;
      background: #ffffff;
      padding: 10px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: flex-start;
      gap: 8px;
      width: 100%;
      min-height: 100%;
    }

    /* Interactive filter bar */
    .controls {
      display: flex;
      gap: 6px;
      width: 100%;
      max-width: 540px;
      justify-content: center;
      flex-wrap: wrap;
    }
    .btn {
      padding: 6px 14px;
      font-size: 13px;
      font-weight: 600;
      border: 1px solid #d1d5db;
      background: #f9fafb;
      color: #374151;
      border-radius: 20px;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      gap: 4px;
      transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
      -webkit-tap-highlight-color: transparent;
    }
    .btn.active {
      background: #2563eb;
      color: #ffffff;
      border-color: #2563eb;
    }

    /* Diagram container */
    .svg-wrap {
      width: 100%;
      max-width: 540px;
      position: relative;
    }
    svg {
      width: 100%;
      height: auto;
      display: block;
      overflow: visible;
    }

    /* Dynamic highlighting */
    .section-group {
      transition: opacity 0.3s ease;
    }
    .dimmed {
      opacity: 0.25;
    }

    /* Animation paths */
    @keyframes flowDown {
      0% { stroke-dashoffset: 24; }
      100% { stroke-dashoffset: 0; }
    }
    @keyframes pulseToxic {
      0%, 100% { transform: scale(1); opacity: 0.85; }
      50% { transform: scale(1.08); opacity: 1; }
    }
    .seep-arrow {
      stroke-dasharray: 6, 6;
      animation: flowDown 1.6s linear infinite;
    }
    .toxic-blob {
      transform-origin: center;
      animation: pulseToxic 2.4s ease-in-out infinite;
    }
  </style>
</head>
<body>

  
  <div class="controls">
    <button class="btn active" id="btn-all" onclick="setMode('all')">All Sources</button>
    <button class="btn" id="btn-farm" onclick="setMode('farm')">🌾 Crop Spraying</button>
    <button class="btn" id="btn-landfill" onclick="setMode('landfill')">🗑️ Landfill Seepage</button>
  </div>

  
  <div class="svg-wrap">
    <svg viewBox="0 0 600 440" role="img" aria-label="Cross section diagram of agricultural chemical pollution and landfill leachate contaminating groundwater">
      <defs>
        
        <marker id="arr-pesticide" markerWidth="6" markerHeight="6" refX="5" refY="3" orient="auto">
          <polygon points="0 0, 6 3, 0 6" fill="#ca8a04" />
        </marker>
        <marker id="arr-leachate" markerWidth="6" markerHeight="6" refX="5" refY="3" orient="auto">
          <polygon points="0 0, 6 3, 0 6" fill="#dc2626" />
        </marker>

        
        <linearGradient id="skyGrad" x1="0" y1="0" x2="0" y2="1">
          <stop offset="0%" stop-color="#eff6ff" />
          <stop offset="100%" stop-color="#dbeafe" />
        </linearGradient>

        <linearGradient id="topsoilGrad" x1="0" y1="0" x2="0" y2="1">
          <stop offset="0%" stop-color="#854d0e" />
          <stop offset="100%" stop-color="#713f12" />
        </linearGradient>

        <linearGradient id="landfillGrad" x1="0" y1="0" x2="0" y2="1">
          <stop offset="0%" stop-color="#cbd5e1" />
          <stop offset="100%" stop-color="#94a3b8" />
        </linearGradient>

        <linearGradient id="aquiferGrad" x1="0" y1="0" x2="1" y2="0">
          <stop offset="0%" stop-color="#38bdf8" />
          <stop offset="50%" stop-color="#60a5fa" />
          <stop offset="100%" stop-color="#a3e635" stop-opacity="0.8" />
        </linearGradient>

        
        <filter id="badgeShadow" x="-10%" y="-10%" width="120%" height="130%">
          <feDropShadow dx="0" dy="2" stdDeviation="2" flood-color="#000" flood-opacity="0.12" />
        </filter>
      </defs>

      
      <rect x="10" y="10" width="580" height="120" rx="8" fill="url(#skyGrad)" />

      
      <line x1="300" y1="10" x2="300" y2="430" stroke="#e2e8f0" stroke-width="2" stroke-dasharray="4,4" />

      
      <g id="grp-farm" class="section-group">
        
        <path d="M 10,130 Q 150,126 295,130 L 295,350 L 10,350 Z" fill="url(#topsoilGrad)" />
        
        
        <path d="M 10,130 Q 150,126 295,130 L 295,138 Q 150,134 10,138 Z" fill="#22c55e" />

        
        <g transform="translate(30, 92)" font-size="28">
          <text x="0" y="30">🌾</text>
          <text x="45" y="30">🌾</text>
          <text x="90" y="30">🌾</text>
          <text x="135" y="30">🌾</text>
          <text x="180" y="30">🌾</text>
          <text x="220" y="30">🌾</text>
        </g>

        
        <g transform="translate(60, 24)">
          
          <line x1="0" y1="20" x2="180" y2="20" stroke="#475569" stroke-width="4" stroke-linecap="round" />
          <circle cx="90" cy="12" r="6" fill="#334155" />
          <line x1="90" y1="0" x2="90" y2="12" stroke="#334155" stroke-width="3" />
          
          
          <polygon points="30,22 10,65 50,65" fill="#fef08a" opacity="0.65" />
          <polygon points="90,22 70,65 110,65" fill="#fef08a" opacity="0.65" />
          <polygon points="150,22 130,65 170,65" fill="#fef08a" opacity="0.65" />

          
          <circle cx="25" cy="55" r="2.5" fill="#ca8a04" />
          <circle cx="35" cy="62" r="2" fill="#ca8a04" />
          <circle cx="85" cy="50" r="2" fill="#ca8a04" />
          <circle cx="98" cy="60" r="2.5" fill="#ca8a04" />
          <circle cx="145" cy="54" r="2" fill="#ca8a04" />
          <circle cx="158" cy="62" r="2.5" fill="#ca8a04" />
        </g>

        
        <g fill="#fde047" opacity="0.85">
          <circle cx="45" cy="165" r="3.5" />
          <circle cx="85" cy="180" r="4" />
          <circle cx="140" cy="160" r="3" />
          <circle cx="190" cy="175" r="4.5" />
          <circle cx="245" cy="165" r="3.5" />

          <circle cx="65" cy="220" r="4" />
          <circle cx="120" cy="240" r="3.5" />
          <circle cx="175" cy="215" r="4.5" />
          <circle cx="230" cy="235" r="3.5" />

          <circle cx="95" cy="285" r="4" />
          <circle cx="160" cy="290" r="3" />
          <circle cx="210" cy="275" r="4" />
        </g>

        
        <line x1="75" y1="175" x2="75" y2="225" stroke="#ca8a04" stroke-width="2.5" class="seep-arrow" marker-end="url(#arr-pesticide)" />
        <line x1="160" y1="165" x2="160" y2="215" stroke="#ca8a04" stroke-width="2.5" class="seep-arrow" marker-end="url(#arr-pesticide)" />
        <line x1="240" y1="180" x2="240" y2="230" stroke="#ca8a04" stroke-width="2.5" class="seep-arrow" marker-end="url(#arr-pesticide)" />

        
        <g transform="translate(100, 245)">
          <path d="M 0,15 Q 20,0 45,15 T 90,15" fill="none" stroke="#f472b6" stroke-width="7" stroke-linecap="round" />
          
          <circle cx="4" cy="13" r="1.5" fill="#831843" />
          <circle cx="45" cy="15" r="14" fill="#fde047" opacity="0.3" class="toxic-blob" />
          <circle cx="45" cy="15" r="3.5" fill="#eab308" />
        </g>
        <g transform="translate(195, 290)">
          <path d="M 0,10 Q 15,22 35,10 T 65,12" fill="none" stroke="#f472b6" stroke-width="6" stroke-linecap="round" />
          <circle cx="35" cy="12" r="10" fill="#fde047" opacity="0.3" class="toxic-blob" />
          <circle cx="35" cy="12" r="3" fill="#eab308" />
        </g>

        
        <g filter="url(#badgeShadow)">
          <rect x="25" y="24" width="130" height="24" rx="12" fill="#ffffff" stroke="#ca8a04" stroke-width="1.5" />
          <text x="90" y="40" text-anchor="middle" font-size="12" font-weight="700" fill="#854d0e">Pesticide Spray</text>
        </g>

        <g filter="url(#badgeShadow)">
          <rect x="25" y="295" width="125" height="24" rx="12" fill="#ffffff" stroke="#e11d48" stroke-width="1.5" />
          <text x="87" y="311" text-anchor="middle" font-size="12" font-weight="700" fill="#9f1239">Soil Organisms</text>
        </g>
      </g>

      
      <g id="grp-landfill" class="section-group">
        
        <path d="M 305,130 L 590,130 L 590,350 L 305,350 Z" fill="#64748b" opacity="0.35" />

        
        <polygon points="325,130 570,130 535,280 360,280" fill="url(#landfillGrad)" stroke="#475569" stroke-width="2" />

        
        <g font-size="20">
          
          <text x="350" y="160">🧴</text>
          <text x="390" y="162">🥫</text>
          <text x="430" y="158">📱</text>
          <text x="475" y="163">🛍️</text>
          <text x="515" y="160">📦</text>
          
          
          <text x="370" y="205">💻</text>
          <text x="410" y="200">🧴</text>
          <text x="450" y="208">🔋</text>
          <text x="495" y="202">🛢️</text>
          
          
          <text x="385" y="250">📱</text>
          <text x="425" y="255">🧴</text>
          <text x="465" y="248">🥫</text>
        </g>

        
        <path d="M 345,175 Q 450,185 550,175" stroke="#475569" stroke-width="2" stroke-dasharray="8,4" fill="none" opacity="0.6" />
        <path d="M 355,225 Q 450,235 540,225" stroke="#475569" stroke-width="2" stroke-dasharray="8,4" fill="none" opacity="0.6" />

        
        <path d="M 360,280 L 535,280 L 525,295 L 370,295 Z" fill="#713f12" />
        <ellipse cx="450" cy="285" rx="75" ry="8" fill="#ca8a04" opacity="0.9" />

        
        <g opacity="0.85">
          
          <path d="M 390,295 C 380,330 400,360 410,385 L 500,385 C 510,355 525,325 505,295 Z" fill="#ca8a04" opacity="0.45" />
          
          
          <line x1="420" y1="295" x2="420" y2="350" stroke="#dc2626" stroke-width="3" class="seep-arrow" marker-end="url(#arr-leachate)" />
          <line x1="450" y1="295" x2="450" y2="360" stroke="#dc2626" stroke-width="3.5" class="seep-arrow" marker-end="url(#arr-leachate)" />
          <line x1="480" y1="295" x2="480" y2="350" stroke="#dc2626" stroke-width="3" class="seep-arrow" marker-end="url(#arr-leachate)" />
        </g>

        
        <g filter="url(#badgeShadow)">
          <rect x="445" y="24" width="125" height="24" rx="12" fill="#ffffff" stroke="#475569" stroke-width="1.5" />
          <text x="507" y="40" text-anchor="middle" font-size="12" font-weight="700" fill="#1e293b">Landfill Waste</text>
        </g>

        <g filter="url(#badgeShadow)">
          <rect x="445" y="305" width="125" height="24" rx="12" fill="#ffffff" stroke="#dc2626" stroke-width="1.5" />
          <text x="507" y="321" text-anchor="middle" font-size="12" font-weight="700" fill="#991b1b">Toxic Leachate</text>
        </g>
      </g>

      
      <g id="grp-aquifer">
        
        <rect x="10" y="350" width="580" height="75" rx="6" fill="#334155" />
        
        
        <rect x="15" y="360" width="570" height="55" rx="4" fill="url(#aquiferGrad)" />

        
        <path d="M 25,385 Q 75,378 125,385 T 225,385" fill="none" stroke="#ffffff" stroke-width="2.5" opacity="0.6" />
        <path d="M 45,400 Q 95,393 145,400 T 245,400" fill="none" stroke="#ffffff" stroke-width="2" opacity="0.4" />

        
        <ellipse cx="455" cy="385" rx="70" ry="20" fill="#84cc16" opacity="0.5" class="toxic-blob" />
        <circle cx="420" cy="385" r="3" fill="#713f12" />
        <circle cx="450" cy="392" r="3.5" fill="#713f12" />
        <circle cx="480" cy="380" r="3" fill="#713f12" />

        
        <g filter="url(#badgeShadow)">
          <rect x="220" y="375" width="160" height="26" rx="13" fill="#ffffff" stroke="#0284c7" stroke-width="1.5" />
          <text x="300" y="392" text-anchor="middle" font-size="13" font-weight="700" fill="#0369a1">Groundwater Aquifer</text>
        </g>
      </g>
    </svg>
  </div>

  <script>
    function setMode(mode) {
      const btnAll = document.getElementById('btn-all');
      const btnFarm = document.getElementById('btn-farm');
      const btnLandfill = document.getElementById('btn-landfill');
      
      const grpFarm = document.getElementById('grp-farm');
      const grpLandfill = document.getElementById('grp-landfill');

      btnAll.classList.remove('active');
      btnFarm.classList.remove('active');
      btnLandfill.classList.remove('active');

      if (mode === 'farm') {
        btnFarm.classList.add('active');
        grpFarm.classList.remove('dimmed');
        grpLandfill.classList.add('dimmed');
      } else if (mode === 'landfill') {
        btnLandfill.classList.add('active');
        grpFarm.classList.add('dimmed');
        grpLandfill.classList.remove('dimmed');
      } else {
        btnAll.classList.add('active');
        grpFarm.classList.remove('dimmed');
        grpLandfill.classList.remove('dimmed');
      }
    }
  </script>
</body>
</html>

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="aspect-ratio" content="1:1">
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      -webkit-tap-highlight-color: transparent;
    }
    body {
      background: #ffffff;
      color: #0f172a;
      padding: 8px 12px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      width: 100%;
      user-select: none;
    }

    /* Preset Buttons */
    .presets {
      display: flex;
      gap: 6px;
      justify-content: center;
    }
    .preset-btn {
      flex: 1;
      padding: 6px 4px;
      font-size: 11px;
      font-weight: 700;
      border: 1px solid #cbd5e1;
      background: #f8fafc;
      color: #475569;
      border-radius: 6px;
      cursor: pointer;
      text-align: center;
      transition: all 0.2s ease;
    }
    .preset-btn.active {
      background: #0f172a;
      color: #ffffff;
      border-color: #0f172a;
    }

    /* J-Curve Graph */
    .graph-container {
      position: relative;
      width: 100%;
      height: 70px;
      background: #f8fafc;
      border-radius: 8px;
      border: 1px solid #f1f5f9;
      overflow: hidden;
    }
    svg.curve-svg {
      width: 100%;
      height: 100%;
      display: block;
    }
    .pulse-dot {
      animation: pulse 1.8s infinite;
      transform-origin: center;
    }
    @keyframes pulse {
      0% { r: 4px; opacity: 1; }
      50% { r: 7px; opacity: 0.4; }
      100% { r: 4px; opacity: 1; }
    }

    /* Sliders Section */
    .controls-grid {
      display: grid;
      grid-template-columns: 1fr auto 1fr;
      align-items: center;
      gap: 8px;
      background: #f8fafc;
      padding: 8px 10px;
      border-radius: 8px;
    }
    .control-box {
      display: flex;
      flex-direction: column;
      gap: 4px;
    }
    .ctrl-label {
      display: flex;
      justify-content: space-between;
      align-items: baseline;
      font-size: 11px;
      font-weight: 700;
    }
    .ctrl-val {
      font-size: 13px;
      font-weight: 800;
    }
    .pop-color { color: #0284c7; }
    .cons-color { color: #ea580c; }
    .mult-sym {
      font-size: 18px;
      font-weight: 800;
      color: #64748b;
      margin-top: 14px;
    }
    input[type=range] {
      width: 100%;
      height: 6px;
      border-radius: 3px;
      outline: none;
      -webkit-appearance: none;
      background: #e2e8f0;
      cursor: pointer;
    }
    #popSlider::-webkit-slider-thumb {
      -webkit-appearance: none;
      width: 18px;
      height: 18px;
      border-radius: 50%;
      background: #0284c7;
      cursor: pointer;
    }
    #consSlider::-webkit-slider-thumb {
      -webkit-appearance: none;
      width: 18px;
      height: 18px;
      border-radius: 50%;
      background: #ea580c;
      cursor: pointer;
    }

    /* Output & Visual Accumulator */
    .output-section {
      display: flex;
      flex-direction: column;
      gap: 6px;
      background: #fff1f2;
      border: 1px solid #ffe4e6;
      border-radius: 8px;
      padding: 8px 10px;
    }
    .output-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .waste-title {
      font-size: 11px;
      font-weight: 800;
      color: #9f1239;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
    .waste-multiplier {
      font-size: 16px;
      font-weight: 900;
      color: #e11d48;
    }

    /* 32-Grid Visual Waste Matrix */
    .waste-grid {
      display: grid;
      grid-template-columns: repeat(16, 1fr);
      grid-template-rows: repeat(2, 1fr);
      gap: 3px;
      height: 38px;
      width: 100%;
    }
    .waste-cell {
      border-radius: 2px;
      background: #fda4af;
      opacity: 0.15;
      transition: all 0.15s ease;
    }
    .waste-cell.active {
      background: #e11d48;
      opacity: 1;
    }
    .waste-cell.active.recent {
      box-shadow: 0 0 4px #e11d48;
    }

    /* Dynamic Equation Display */
    .equation-bar {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 6px;
      font-size: 12px;
      font-weight: 700;
      color: #334155;
      padding-top: 2px;
    }
    .eq-pill {
      padding: 2px 6px;
      border-radius: 4px;
    }
    .pop-pill { background: #e0f2fe; color: #0369a1; }
    .cons-pill { background: #ffedd5; color: #c2410c; }
    .waste-pill { background: #ffe4e6; color: #be123c; font-weight: 800; }
  </style>
</head>
<body>

  
  <div class="presets">
    <button class="preset-btn" id="btn1800" onclick="setScenario(1, 1)">1800 Baseline</button>
    <button class="preset-btn" id="btn1960" onclick="setScenario(3, 2)">1960 Boom</button>
    <button class="preset-btn active" id="btnModern" onclick="setScenario(8, 4)">Modern Day</button>
  </div>

  
  <div class="graph-container">
    <svg class="curve-svg" viewBox="0 0 320 70" preserveAspectRatio="none">
      
      <line x1="20" y1="60" x2="305" y2="60" stroke="#cbd5e1" stroke-width="1" />
      
      
      <path d="M 20 56 Q 160 54 220 40 T 300 10" fill="none" stroke="#0284c7" stroke-width="2.5" />

      
      <path d="M 20 56 Q 160 54 220 40 T 300 10 L 300 60 L 20 60 Z" fill="#0284c7" fill-opacity="0.08" />

      
      <circle cx="20" cy="56" r="3" fill="#0284c7" />
      <text x="20" y="68" font-size="8" fill="#64748b" font-weight="600" text-anchor="start">1800 (1B)</text>

      <circle cx="190" cy="45" r="3" fill="#0284c7" />
      <text x="190" y="56" font-size="8" fill="#64748b" font-weight="600" text-anchor="middle">1960 (3B)</text>

      
      <circle id="trackDot" cx="300" cy="10" r="4.5" fill="#e11d48" class="pulse-dot" />
      <text id="trackLabel" x="298" y="8" font-size="8" fill="#0f172a" font-weight="700" text-anchor="end">Today (8B+)</text>
    </svg>
  </div>

  
  <div class="controls-grid">
    <div class="control-box">
      <div class="ctrl-label">
        <span class="pop-color">Population</span>
        <span class="ctrl-val pop-color" id="popVal">8×</span>
      </div>
      <input type="range" id="popSlider" min="1" max="8" step="1" value="8" oninput="updateValues()">
    </div>

    <div class="mult-sym">×</div>

    <div class="control-box">
      <div class="ctrl-label">
        <span class="cons-color">Per-Capita</span>
        <span class="ctrl-val cons-color" id="consVal">4×</span>
      </div>
      <input type="range" id="consSlider" min="1" max="4" step="1" value="4" oninput="updateValues()">
    </div>
  </div>

  
  <div class="output-section">
    <div class="output-header">
      <span class="waste-title">Total Waste Generated</span>
      <span class="waste-multiplier" id="totalMult">32× Output</span>
    </div>

    
    <div class="waste-grid" id="wasteGrid"></div>

    
    <div class="equation-bar">
      <span class="eq-pill pop-pill" id="eqPop">8× Pop</span>
      <span>×</span>
      <span class="eq-pill cons-pill" id="eqCons">4× Resource Use</span>
      <span>=</span>
      <span class="eq-pill waste-pill" id="eqWaste">32× Waste</span>
    </div>
  </div>

  <script>
    // Generate 32 grid units
    const wasteGrid = document.getElementById('wasteGrid');
    for (let i = 0; i < 32; i++) {
      const cell = document.createElement('div');
      cell.className = 'waste-cell';
      cell.id = 'cell-' + i;
      wasteGrid.appendChild(cell);
    }

    const popCoords = {
      1: { x: 20, y: 56, label: "1800 (1B)" },
      2: { x: 120, y: 52, label: "1927 (2B)" },
      3: { x: 190, y: 45, label: "1960 (3B)" },
      4: { x: 228, y: 37, label: "1974 (4B)" },
      5: { x: 250, y: 29, label: "1987 (5B)" },
      6: { x: 270, y: 22, label: "1999 (6B)" },
      7: { x: 285, y: 16, label: "2011 (7B)" },
      8: { x: 300, y: 10, label: "Today (8B+)" }
    };

    function updateValues() {
      const p = parseInt(document.getElementById('popSlider').value);
      const c = parseInt(document.getElementById('consSlider').value);
      const total = p * c;

      // Update text displays
      document.getElementById('popVal').textContent = p + '×';
      document.getElementById('consVal').textContent = c + '×';
      document.getElementById('totalMult').textContent = total + '× Output';

      document.getElementById('eqPop').textContent = p + '× Pop';
      document.getElementById('eqCons').textContent = c + '× Use';
      document.getElementById('eqWaste').textContent = total + '× Waste';

      // Update Curve Dot
      const pt = popCoords[p];
      const dot = document.getElementById('trackDot');
      const label = document.getElementById('trackLabel');
      dot.setAttribute('cx', pt.x);
      dot.setAttribute('cy', pt.y);
      label.setAttribute('x', pt.x > 240 ? pt.x - 8 : pt.x + 8);
      label.setAttribute('text-anchor', pt.x > 240 ? 'end' : 'start');
      label.setAttribute('y', Math.max(8, pt.y - 4));
      label.textContent = pt.label;

      // Update Waste Matrix Grid
      for (let i = 0; i < 32; i++) {
        const cell = document.getElementById('cell-' + i);
        if (i < total) {
          cell.classList.add('active');
        } else {
          cell.classList.remove('active');
        }
      }

      // Sync preset button active state
      document.getElementById('btn1800').classList.toggle('active', p === 1 && c === 1);
      document.getElementById('btn1960').classList.toggle('active', p === 3 && c === 2);
      document.getElementById('btnModern').classList.toggle('active', p === 8 && c === 4);
    }

    function setScenario(pop, cons) {
      document.getElementById('popSlider').value = pop;
      document.getElementById('consSlider').value = cons;
      updateValues();
    }

    // Initial render
    updateValues();
  </script>
</body>
</html>

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="aspect-ratio" content="1:1">
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
      background: transparent;
      color: #1e2945;
      display: flex;
      flex-direction: column;
      height: 100%;
      padding: 6px;
      user-select: none;
    }

    .grid-container {
      display: grid;
      grid-template-columns: 1fr 1fr;
      grid-template-rows: 1fr 1fr;
      gap: 10px;
      width: 100%;
      height: 100%;
    }

    .tile {
      background: #ffffff;
      border: 1.5px solid #e2e8f0;
      border-radius: 12px;
      padding: 8px 10px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      overflow: hidden;
      transition: border-color 0.2s ease, box-shadow 0.2s ease;
      cursor: pointer;
    }

    .tile.active {
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    }

    /* Color Accents */
    .tile.building { border-top: 4px solid #3b82f6; }
    .tile.building.active { border-color: #3b82f6; }

    .tile.farming { border-top: 4px solid #16a34a; }
    .tile.farming.active { border-color: #16a34a; }

    .tile.quarrying { border-top: 4px solid #d97706; }
    .tile.quarrying.active { border-color: #d97706; }

    .tile.waste { border-top: 4px solid #7c3aed; }
    .tile.waste.active { border-color: #7c3aed; }

    .tile-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .title {
      font-size: 14px;
      font-weight: 700;
      color: #0f172a;
      letter-spacing: -0.01em;
    }

    .tag {
      font-size: 11px;
      font-weight: 600;
      padding: 2px 6px;
      border-radius: 6px;
      background: #f1f5f9;
      color: #64748b;
    }

    .building .tag { color: #2563eb; background: #eff6ff; }
    .farming .tag { color: #15803d; background: #f0fdf4; }
    .quarrying .tag { color: #b45309; background: #fefce8; }
    .waste .tag { color: #6d28d9; background: #f5f3ff; }

    .art-frame {
      width: 100%;
      flex: 1;
      min-height: 0;
      margin: 4px 0;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    svg {
      width: 100%;
      height: 100%;
      max-height: 105px;
      display: block;
    }
  </style>
</head>
<body>

  <div class="grid-container">

    
    <div class="tile building" onclick="selectTile(this)">
      <div class="tile-header">
        <span class="title">1. Building</span>
        <span class="tag">Habitat Loss</span>
      </div>
      <div class="art-frame">
        <svg viewBox="0 0 160 90" fill="none">
          
          <rect width="160" height="90" rx="6" fill="#f0f9ff"/>
          
          <rect y="65" width="160" height="25" fill="#86efac"/>
          
          <path d="M0 90 L40 68 L120 68 L160 90 Z" fill="#475569"/>
          <line x1="80" y1="70" x2="80" y2="88" stroke="#f8fafc" stroke-width="2" stroke-dasharray="3 3"/>
          
          <rect x="22" y="32" width="28" height="36" rx="2" fill="#94a3b8"/>
          <rect x="27" y="38" width="5" height="6" fill="#fef08a"/>
          <rect x="39" y="38" width="5" height="6" fill="#fef08a"/>
          <rect x="27" y="50" width="5" height="6" fill="#f8fafc"/>
          <rect x="39" y="50" width="5" height="6" fill="#f8fafc"/>
          
          <rect x="56" y="20" width="34" height="48" rx="2" fill="#64748b"/>
          <rect x="62" y="26" width="6" height="7" fill="#f8fafc"/>
          <rect x="76" y="26" width="6" height="7" fill="#fef08a"/>
          <rect x="62" y="40" width="6" height="7" fill="#fef08a"/>
          <rect x="76" y="40" width="6" height="7" fill="#f8fafc"/>
          <rect x="62" y="54" width="6" height="7" fill="#f8fafc"/>
          <rect x="76" y="54" width="6" height="7" fill="#f8fafc"/>

          <rect x="96" y="40" width="24" height="28" rx="2" fill="#cbd5e1"/>
          
          <path d="M135 24 L135 68 M125 24 L152 24 M135 24 L125 32" stroke="#f59e0b" stroke-width="2" stroke-linecap="round"/>
        </svg>
      </div>
    </div>

    
    <div class="tile farming" onclick="selectTile(this)">
      <div class="tile-header">
        <span class="title">2. Farming</span>
        <span class="tag">Deforestation</span>
      </div>
      <div class="art-frame">
        <svg viewBox="0 0 160 90" fill="none">
          <rect width="160" height="90" rx="6" fill="#fefce8"/>
          
          <ellipse cx="25" cy="38" rx="14" ry="12" fill="#bbf7d0"/>
          <path d="M125 40 L132 40 L130 46 L127 46 Z" fill="#92400e"/>
          
          <path d="M0 90 L60 48 L100 48 L160 90 Z" fill="#ca8a04"/>
          <path d="M15 90 L65 48 L75 48 L35 90 Z" fill="#a16207"/>
          <path d="M55 90 L78 48 L88 48 L75 90 Z" fill="#a16207"/>
          <path d="M95 90 L90 48 L100 48 L115 90 Z" fill="#a16207"/>
          <path d="M135 90 L100 48 L110 48 L155 90 Z" fill="#a16207"/>
          
          <circle cx="45" cy="74" r="3" fill="#fde047"/>
          <circle cx="85" cy="74" r="3" fill="#fde047"/>
          <circle cx="125" cy="74" r="3" fill="#fde047"/>
          <circle cx="70" cy="58" r="2" fill="#fde047"/>
          <circle cx="95" cy="58" r="2" fill="#fde047"/>
        </svg>
      </div>
    </div>

    
    <div class="tile quarrying" onclick="selectTile(this)">
      <div class="tile-header">
        <span class="title">3. Quarrying</span>
        <span class="tag">Scarred Land</span>
      </div>
      <div class="art-frame">
        <svg viewBox="0 0 160 90" fill="none">
          <rect width="160" height="90" rx="6" fill="#fffbeb"/>
          
          <rect y="22" width="160" height="12" fill="#86efac"/>
          
          <path d="M10 26 L25 44 L135 44 L150 26 Z" fill="#d6d3d1"/>
          <path d="M25 44 L40 62 L120 62 L135 44 Z" fill="#a8a29e"/>
          <path d="M40 62 L55 80 L105 80 L120 62 Z" fill="#78716c"/>
          <path d="M55 80 L65 90 L95 90 L105 80 Z" fill="#57534e"/>
          
          <rect x="75" y="72" width="14" height="7" rx="1" fill="#f59e0b"/>
          <circle cx="78" cy="80" r="2" fill="#1c1917"/>
          <circle cx="86" cy="80" r="2" fill="#1c1917"/>
          <path d="M89 74 L98 68 L103 73" stroke="#f59e0b" stroke-width="2" stroke-linecap="round"/>
        </svg>
      </div>
    </div>

    
    <div class="tile waste" onclick="selectTile(this)">
      <div class="tile-header">
        <span class="title">4. Waste Disposal</span>
        <span class="tag">Pollution</span>
      </div>
      <div class="art-frame">
        <svg viewBox="0 0 160 90" fill="none">
          <rect width="160" height="90" rx="6" fill="#faf5ff"/>
          
          <path d="M0 86 Q80 40 160 86 L160 90 L0 90 Z" fill="#71717a"/>
          
          <ellipse cx="80" cy="62" rx="45" ry="14" fill="#a1a1aa"/>
          <circle cx="60" cy="64" r="3" fill="#f87171"/>
          <rect x="72" y="60" width="6" height="5" rx="1" fill="#60a5fa"/>
          <circle cx="95" cy="62" r="3.5" fill="#fbbf24"/>
          <rect x="108" y="64" width="7" height="4" rx="1" fill="#34d399"/>
          
          <circle cx="75" cy="72" r="3" fill="#fbbf24"/>
          <rect x="86" y="70" width="8" height="5" rx="1" fill="#f87171"/>
          <circle cx="102" cy="73" r="2.5" fill="#60a5fa"/>
          
          <path d="M50 48 Q54 40 50 34" stroke="#a78bfa" stroke-width="2" stroke-linecap="round" stroke-dasharray="2 2"/>
          <path d="M80 44 Q85 36 80 28" stroke="#a78bfa" stroke-width="2" stroke-linecap="round" stroke-dasharray="2 2"/>
          <path d="M110 48 Q114 40 110 34" stroke="#a78bfa" stroke-width="2" stroke-linecap="round" stroke-dasharray="2 2"/>
        </svg>
      </div>
    </div>

  </div>

  <script>
    function selectTile(selected) {
      document.querySelectorAll('.tile').forEach(t => t.classList.remove('active'));
      selected.classList.add('active');
    }
  </script>
</body>
</html>

How Human Activities Affect Ecosystems

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="aspect-ratio" content="4:3">
  <title>Biodiversity and Ecosystem Stability</title>
  <style>
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: system-ui, -apple-system, sans-serif;
      background: #ffffff;
      color: #1e2945;
      padding: 12px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      min-height: 100%;
    }

    .controls {
      display: flex;
      gap: 8px;
      margin-bottom: 12px;
      width: 100%;
      max-width: 480px;
    }

    .btn {
      flex: 1;
      padding: 8px 12px;
      border: 1px solid #e2e8f0;
      background: #f8fafc;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 600;
      color: #64748b;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
      transition: all 0.25s ease;
    }

    .btn.active {
      background: #1e2945;
      color: #ffffff;
      border-color: #1e2945;
      box-shadow: 0 2px 6px rgba(30, 41, 69, 0.15);
    }

    .grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
      width: 100%;
      max-width: 600px;
    }

    .panel {
      background: #fafafa;
      border: 1px solid #e5e7eb;
      border-radius: 12px;
      padding: 10px;
      display: flex;
      flex-direction: column;
      align-items: center;
      position: relative;
    }

    .header-badge {
      font-size: 13px;
      font-weight: 700;
      padding: 4px 10px;
      border-radius: 12px;
      margin-bottom: 8px;
      text-align: center;
    }

    .badge-green {
      background: #e6f4ea;
      color: #137333;
      border: 1px solid #ceead6;
    }

    .badge-red {
      background: #fef2f2;
      color: #b91c1c;
      border: 1px solid #fecaca;
    }

    .arena {
      position: relative;
      width: 100%;
      height: 190px;
      margin: 4px 0;
    }

    svg.network {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      pointer-events: none;
    }

    line {
      stroke-width: 2.5;
      stroke-linecap: round;
      transition: stroke 0.35s ease, stroke-dasharray 0.35s ease, opacity 0.35s ease;
    }

    .line-active {
      stroke: #10b981;
      opacity: 0.9;
    }

    .line-fragile {
      stroke: #f59e0b;
      opacity: 0.9;
    }

    .line-dead {
      stroke: #cbd5e1;
      stroke-dasharray: 4 4;
      opacity: 0.4;
    }

    .node {
      position: absolute;
      transform: translate(-50%, -50%);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      width: 38px;
      height: 38px;
      background: #ffffff;
      border-radius: 50%;
      box-shadow: 0 2px 5px rgba(0, 0, 0, 0.08);
      border: 1.5px solid #e2e8f0;
      font-size: 18px;
      user-select: none;
      transition: all 0.35s ease;
      z-index: 2;
    }

    .node.removed {
      background: #fee2e2;
      border-color: #ef4444;
      opacity: 0.6;
      filter: grayscale(0.8);
    }

    .node.starved {
      background: #fff1f2;
      border-color: #fda4af;
      opacity: 0.5;
      filter: grayscale(0.9);
    }

    .node .cross {
      position: absolute;
      top: -4px;
      right: -4px;
      background: #ef4444;
      color: #ffffff;
      font-size: 10px;
      font-weight: 900;
      width: 16px;
      height: 16px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      opacity: 0;
      transform: scale(0.5);
      transition: all 0.3s ease;
    }

    .node.removed .cross, .node.starved .cross {
      opacity: 1;
      transform: scale(1);
    }

    .node.starved .cross {
      background: #f59e0b;
    }

    .status-box {
      width: 100%;
      text-align: center;
      padding: 6px 8px;
      border-radius: 8px;
      font-size: 12px;
      font-weight: 600;
      margin-top: 4px;
      transition: all 0.3s ease;
    }

    .status-stable {
      background: #dcfce7;
      color: #15803d;
      border: 1px solid #bbf7d0;
    }

    .status-warning {
      background: #fef3c7;
      color: #b45309;
      border: 1px solid #fde68a;
    }

    .status-collapsed {
      background: #fee2e2;
      color: #b91c1c;
      border: 1px solid #fecaca;
    }
  </style>
</head>
<body>

  <div class="controls">
    <button class="btn active" id="btnIntact" onclick="setState(false)">
      <span>🌿</span> Intact System
    </button>
    <button class="btn" id="btnDisrupt" onclick="setState(true)">
      <span>⚡</span> Species Removed
    </button>
  </div>

  <div class="grid">
    
    <div class="panel">
      <div class="header-badge badge-green">High Biodiversity</div>
      
      <div class="arena">
        <svg class="network" viewBox="0 0 100 100" preserveAspectRatio="none">
          
          <line id="l_g_m" x1="32" y1="82" x2="22" y2="50" class="line-active" />
          <line id="l_g_r" x1="32" y1="82" x2="50" y2="50" class="line-active" />
          <line id="l_b_r" x1="68" y1="82" x2="50" y2="50" class="line-active" />
          <line id="l_b_d" x1="68" y1="82" x2="78" y2="50" class="line-active" />
          <line id="l_m_o" x1="22" y1="50" x2="50" y2="18" class="line-active" />
          <line id="l_r_o" x1="50" y1="50" x2="50" y2="18" class="line-active" />
          <line id="l_d_o" x1="78" y1="50" x2="50" y2="18" class="line-active" />
        </svg>

        
        <div class="node" style="left: 50%; top: 18%;">🦉</div>
        
        
        <div class="node" id="node-mouse-left" style="left: 22%; top: 50%;">
          🐭<div class="cross">✕</div>
        </div>
        <div class="node" style="left: 50%; top: 50%;">🐰</div>
        <div class="node" style="left: 78%; top: 50%;">🐦</div>

        
        <div class="node" style="left: 32%; top: 82%;">🌾</div>
        <div class="node" style="left: 68%; top: 82%;">🍓</div>
      </div>

      <div id="status-left" class="status-box status-stable">Stable (Many links)</div>
    </div>

    
    <div class="panel">
      <div class="header-badge badge-red">Low Biodiversity</div>
      
      <div class="arena">
        <svg class="network" viewBox="0 0 100 100" preserveAspectRatio="none">
          
          <line id="l_c_m" x1="50" y1="82" x2="50" y2="50" class="line-fragile" />
          <line id="l_m_h" x1="50" y1="50" x2="50" y2="18" class="line-fragile" />
        </svg>

        
        <div class="node" id="node-hawk" style="left: 50%; top: 18%;">
          🦅<div class="cross">!</div>
        </div>

        
        <div class="node" id="node-mouse-right" style="left: 50%; top: 50%;">
          🐭<div class="cross">✕</div>
        </div>

        
        <div class="node" style="left: 50%; top: 82%;">🌽</div>
      </div>

      <div id="status-right" class="status-box status-warning">Fragile (1 link)</div>
    </div>
  </div>

  <script>
    let isDisrupted = false;

    function setState(disrupt) {
      isDisrupted = disrupt;
      
      const btnIntact = document.getElementById('btnIntact');
      const btnDisrupt = document.getElementById('btnDisrupt');
      const mouseLeft = document.getElementById('node-mouse-left');
      const mouseRight = document.getElementById('node-mouse-right');
      const hawk = document.getElementById('node-hawk');
      
      const lgm = document.getElementById('l_g_m');
      const lmo = document.getElementById('l_m_o');
      const lcm = document.getElementById('l_c_m');
      const lmh = document.getElementById('l_m_h');

      const statusLeft = document.getElementById('status-left');
      const statusRight = document.getElementById('status-right');

      if (isDisrupted) {
        btnIntact.classList.remove('active');
        btnDisrupt.classList.add('active');

        // High biodiversity reaction: 1 species lost, web persists
        mouseLeft.classList.add('removed');
        lgm.className.baseVal = 'line-dead';
        lmo.className.baseVal = 'line-dead';
        statusLeft.className = 'status-box status-stable';
        statusLeft.textContent = 'Stable (Other prey remain)';

        // Low biodiversity reaction: total collapse
        mouseRight.classList.add('removed');
        hawk.classList.add('starved');
        lcm.className.baseVal = 'line-dead';
        lmh.className.baseVal = 'line-dead';
        statusRight.className = 'status-box status-collapsed';
        statusRight.textContent = 'Collapses (No food)';
      } else {
        btnIntact.classList.add('active');
        btnDisrupt.classList.remove('active');

        // Reset
        mouseLeft.classList.remove('removed');
        hawk.classList.remove('starved');
        mouseRight.classList.remove('removed');

        lgm.className.baseVal = 'line-active';
        lmo.className.baseVal = 'line-active';
        lcm.className.baseVal = 'line-fragile';
        lmh.className.baseVal = 'line-fragile';

        statusLeft.className = 'status-box status-stable';
        statusLeft.textContent = 'Stable (Many links)';
        statusRight.className = 'status-box status-warning';
        statusRight.textContent = 'Fragile (1 link)';
      }
    }
  </script>
</body>
</html>

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Human Population Growth</title>
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-tap-highlight-color: transparent;
      user-select: none;
    }

    body {
      width: 100%;
      min-height: 100vh;
      background: #f8f9fa;
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      color: #1e2945;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      padding: 12px 14px;
      overflow-x: hidden;
    }

    /* Top info banner */
    .header {
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      gap: 8px;
      margin-bottom: 8px;
    }

    .data-pill {
      display: flex;
      align-items: baseline;
      gap: 8px;
      background: #ffffff;
      padding: 6px 14px;
      border-radius: 20px;
      border: 1px solid #cbd5e1;
      box-shadow: 0 1px 2px rgba(0,0,0,0.04);
    }

    .pill-year {
      font-size: 16px;
      font-weight: 700;
      color: #1e2945;
    }

    .pill-pop {
      font-size: 16px;
      font-weight: 800;
      color: #0284c7;
    }

    /* Milestone buttons */
    .milestones {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      align-items: center;
    }

    .milestone-btn {
      background: #ffffff;
      border: 1px solid #cbd5e1;
      border-radius: 16px;
      padding: 6px 12px;
      font-size: 12px;
      font-weight: 600;
      color: #475569;
      cursor: pointer;
      white-space: nowrap;
      min-height: 32px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: background-color 0.2s, color 0.2s, border-color 0.2s;
    }

    .milestone-btn:active {
      opacity: 0.85;
    }

    .milestone-btn.active {
      background: #0284c7;
      color: #ffffff;
      border-color: #0284c7;
    }

    /* Chart SVG */
    .chart-container {
      position: relative;
      width: 100%;
      flex: 1;
      min-height: 220px;
      max-height: 380px;
      display: flex;
      align-items: center;
      touch-action: none;
    }

    svg {
      width: 100%;
      height: 100%;
      overflow: visible;
    }

    .axis-line {
      stroke: #94a3b8;
      stroke-width: 1.5;
    }

    .grid-line {
      stroke: #e2e8f0;
      stroke-dasharray: 4 4;
      stroke-width: 1;
    }

    .axis-label {
      font-size: 13px;
      font-weight: 500;
      fill: #475569;
      font-family: inherit;
    }

    .curve-path {
      fill: none;
      stroke: #0284c7;
      stroke-width: 4;
      stroke-linecap: round;
      stroke-linejoin: round;
    }

    .area-path {
      fill: url(#blueGradient);
      opacity: 0.22;
    }

    .scrub-line {
      stroke: #64748b;
      stroke-width: 1.5;
      stroke-dasharray: 3 3;
    }

    .milestone-dot {
      fill: #ffffff;
      stroke: #0284c7;
      stroke-width: 2.5;
      cursor: pointer;
    }

    .active-dot {
      fill: #0284c7;
      stroke: #ffffff;
      stroke-width: 3.5;
      filter: drop-shadow(0 2px 5px rgba(2, 132, 199, 0.45));
    }

    .tag-rect {
      fill: #1e2945;
      rx: 6;
    }

    .tag-text {
      font-size: 12px;
      font-weight: 600;
      fill: #ffffff;
      text-anchor: middle;
      dominant-baseline: central;
    }

    /* Slider bar */
    .slider-bar {
      margin-top: 8px;
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .slider-label {
      font-size: 13px;
      font-weight: 700;
      color: #475569;
    }

    .slider {
      flex: 1;
      -webkit-appearance: none;
      appearance: none;
      height: 8px;
      border-radius: 4px;
      background: #e2e8f0;
      outline: none;
      cursor: pointer;
    }

    .slider::-webkit-slider-thumb {
      -webkit-appearance: none;
      appearance: none;
      width: 24px;
      height: 24px;
      border-radius: 50%;
      background: #0284c7;
      border: 3px solid #ffffff;
      box-shadow: 0 1px 4px rgba(0,0,0,0.3);
      cursor: pointer;
    }

    .slider::-moz-range-thumb {
      width: 24px;
      height: 24px;
      border-radius: 50%;
      background: #0284c7;
      border: 3px solid #ffffff;
      box-shadow: 0 1px 4px rgba(0,0,0,0.3);
      cursor: pointer;
    }

    @media (max-width: 400px) {
      .header {
        justify-content: center;
      }
      .data-pill {
        width: 100%;
        justify-content: center;
      }
      .milestones {
        width: 100%;
        justify-content: space-between;
      }
      .milestone-btn {
        flex: 1;
        padding: 6px 4px;
        font-size: 11px;
      }
    }
  </style>
</head>
<body>

  <div class="header">
    <div class="data-pill">
      <span class="pill-year" id="displayYear">2025 AD</span>
      <span class="pill-pop" id="displayPop">8.16 Billion</span>
    </div>
    <div class="milestones">
      <button class="milestone-btn" onclick="goToYear(1650)">Farming</button>
      <button class="milestone-btn" onclick="goToYear(1800)">Industry</button>
      <button class="milestone-btn" onclick="goToYear(1950)">Medicine</button>
      <button class="milestone-btn active" onclick="goToYear(2025)">Now</button>
    </div>
  </div>

  <div class="chart-container" id="container">
    <svg viewBox="0 0 500 280" preserveAspectRatio="none" id="chartSvg">
      <defs>
        <linearGradient id="blueGradient" x1="0" y1="0" x2="0" y2="1">
          <stop offset="0%" stop-color="#0284c7" stop-opacity="0.8"/>
          <stop offset="100%" stop-color="#0284c7" stop-opacity="0.05"/>
        </linearGradient>
      </defs>

      
      <line x1="50" y1="20" x2="480" y2="20" class="grid-line"/>
      <text x="42" y="24" class="axis-label" text-anchor="end">8B</text>

      <line x1="50" y1="75" x2="480" y2="75" class="grid-line"/>
      <text x="42" y="79" class="axis-label" text-anchor="end">6B</text>

      <line x1="50" y1="130" x2="480" y2="130" class="grid-line"/>
      <text x="42" y="134" class="axis-label" text-anchor="end">4B</text>

      <line x1="50" y1="185" x2="480" y2="185" class="grid-line"/>
      <text x="42" y="189" class="axis-label" text-anchor="end">2B</text>

      <line x1="50" y1="240" x2="480" y2="240" class="axis-line"/>
      <text x="42" y="244" class="axis-label" text-anchor="end">0B</text>

      
      <line x1="50" y1="20" x2="50" y2="240" class="axis-line"/>
      
      <text x="50" y="260" class="axis-label" text-anchor="start">1000</text>
      <text x="175" y="260" class="axis-label" text-anchor="middle">1300</text>
      <text x="300" y="260" class="axis-label" text-anchor="middle">1600</text>
      <text x="385" y="260" class="axis-label" text-anchor="middle">1800</text>
      <text x="480" y="260" class="axis-label" text-anchor="end">2025</text>

      
      <path id="curveArea" class="area-path"/>
      <path id="curveLine" class="curve-path"/>

      
      <line id="trackLine" class="scrub-line" y1="20" y2="240"/>
      <circle id="trackDot" class="active-dot" r="7"/>

      
      <g id="calloutBadge" style="display: none;">
        <rect id="calloutRect" class="tag-rect" height="24"/>
        <text id="calloutText" class="tag-text"></text>
      </g>
    </svg>
  </div>

  <div class="slider-bar">
    <span class="slider-label">1000 AD</span>
    <input type="range" class="slider" id="yearSlider" min="1000" max="2025" value="2025" aria-label="Timeline scrubber">
    <span class="slider-label">2025 AD</span>
  </div>

  <script>
    const rawData = [
      { y: 1000, p: 0.31 },
      { y: 1200, p: 0.40 },
      { y: 1350, p: 0.37 },
      { y: 1500, p: 0.48 },
      { y: 1650, p: 0.55, label: "Agricultural improvements" },
      { y: 1750, p: 0.79 },
      { y: 1800, p: 1.00, label: "Industrial Revolution" },
      { y: 1850, p: 1.26 },
      { y: 1900, p: 1.65 },
      { y: 1950, p: 2.52, label: "Modern medicine & sanitation" },
      { y: 1975, p: 4.07 },
      { y: 2000, p: 6.14 },
      { y: 2025, p: 8.16, label: "Past 8 Billion" }
    ];

    const minX = 1000, maxX = 2025;
    const minY = 0, maxY = 8.5;
    const plotLeft = 50, plotRight = 480;
    const plotTop = 20, plotBottom = 240;

    function mapX(year) {
      return plotLeft + ((year - minX) / (maxX - minX)) * (plotRight - plotLeft);
    }

    function mapY(pop) {
      return plotBottom - ((pop - minY) / (maxY - minY)) * (plotBottom - plotTop);
    }

    function getPopAtYear(targetYear) {
      if (targetYear <= rawData[0].y) return rawData[0].p;
      if (targetYear >= rawData[rawData.length - 1].y) return rawData[rawData.length - 1].p;
      
      for (let i = 0; i < rawData.length - 1; i++) {
        const p1 = rawData[i];
        const p2 = rawData[i + 1];
        if (targetYear >= p1.y && targetYear <= p2.y) {
          const t = (targetYear - p1.y) / (p2.y - p1.y);
          return p1.p + t * (p2.p - p1.p);
        }
      }
      return 0.3;
    }

    // Build smooth curve path
    const points = [];
    for (let yr = 1000; yr <= 2025; yr += 5) {
      points.push({ x: mapX(yr), y: mapY(getPopAtYear(yr)) });
    }

    let dStr = `M ${points[0].x},${points[0].y} `;
    for (let i = 1; i < points.length; i++) {
      dStr += `L ${points[i].x},${points[i].y} `;
    }

    document.getElementById('curveLine').setAttribute('d', dStr);
    document.getElementById('curveArea').setAttribute('d', `${dStr} L ${mapX(2025)},${plotBottom} L ${mapX(1000)},${plotBottom} Z`);

    // Render milestone marker circles
    const svgEl = document.getElementById('chartSvg');
    rawData.filter(d => d.label).forEach(m => {
      const cx = mapX(m.y);
      const cy = mapY(m.p);
      const circle = document.createElementNS('http://www.w3.org/2000/svg', 'circle');
      circle.setAttribute('cx', cx);
      circle.setAttribute('cy', cy);
      circle.setAttribute('r', 5);
      circle.setAttribute('class', 'milestone-dot');
      circle.onclick = () => goToYear(m.y);
      svgEl.appendChild(circle);
    });

    const slider = document.getElementById('yearSlider');
    const displayYear = document.getElementById('displayYear');
    const displayPop = document.getElementById('displayPop');
    const trackLine = document.getElementById('trackLine');
    const trackDot = document.getElementById('trackDot');
    const badge = document.getElementById('calloutBadge');
    const badgeRect = document.getElementById('calloutRect');
    const badgeText = document.getElementById('calloutText');
    const buttons = document.querySelectorAll('.milestone-btn');

    function updateView(year) {
      const pop = getPopAtYear(year);
      const x = mapX(year);
      const y = mapY(pop);

      displayYear.textContent = `${Math.round(year)} AD`;
      displayPop.textContent = `${pop.toFixed(2)} Billion`;

      trackLine.setAttribute('x1', x);
      trackLine.setAttribute('x2', x);
      trackDot.setAttribute('cx', x);
      trackDot.setAttribute('cy', y);

      // Check for milestone labels nearby
      const match = rawData.find(d => d.label && Math.abs(d.y - year) <= 15);
      if (match) {
        badge.style.display = 'block';
        badgeText.textContent = match.label;
        const textWidth = match.label.length * 7 + 20;
        let badgeX = x;
        if (badgeX + textWidth / 2 > plotRight) badgeX = plotRight - textWidth / 2;
        if (badgeX - textWidth / 2 < plotLeft) badgeX = plotLeft + textWidth / 2;

        const badgeY = Math.max(14, y - 24);
        badgeRect.setAttribute('width', textWidth);
        badgeRect.setAttribute('x', badgeX - textWidth / 2);
        badgeRect.setAttribute('y', badgeY - 12);
        badgeText.setAttribute('x', badgeX);
        badgeText.setAttribute('y', badgeY);
      } else {
        badge.style.display = 'none';
      }

      // Update button active state
      buttons.forEach(btn => {
        const fn = btn.getAttribute('onclick');
        if (fn && fn.includes(year.toString())) {
          btn.classList.add('active');
        } else {
          btn.classList.remove('active');
        }
      });
    }

    function goToYear(yr) {
      slider.value = yr;
      updateView(yr);
    }

    slider.addEventListener('input', (e) => {
      updateView(parseFloat(e.target.value));
    });

    // Touch & scrub direct on chart
    const container = document.getElementById('container');
    function handleChartScrub(e) {
      const rect = container.getBoundingClientRect();
      const clientX = (e.touches && e.touches[0]) ? e.touches[0].clientX : e.clientX;
      const ratio = (clientX - rect.left) / rect.width;
      const svgX = ratio * 500;
      const clampedX = Math.max(plotLeft, Math.min(plotRight, svgX));
      const year = minX + ((clampedX - plotLeft) / (plotRight - plotLeft)) * (maxX - minX);
      goToYear(Math.round(year));
    }

    let isDragging = false;
    container.addEventListener('pointerdown', (e) => { isDragging = true; handleChartScrub(e); });
    window.addEventListener('pointermove', (e) => { if (isDragging) handleChartScrub(e); });
    window.addEventListener('pointerup', () => { isDragging = false; });
    window.addEventListener('pointercancel', () => { isDragging = false; });

    // Initial render
    updateView(2025);
  </script>
</body>
</html>

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="aspect-ratio" content="4:3">
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
      -webkit-tap-highlight-color: transparent;
    }

    body {
      background: #ffffff;
      color: #1e2945;
      padding: 12px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: space-between;
      min-height: 100%;
    }

    .main-grid {
      width: 100%;
      max-width: 640px;
      display: grid;
      grid-template-columns: 1fr auto 1fr;
      gap: 10px;
      align-items: center;
      margin-top: 4px;
    }

    .era-card {
      background: #f8fafc;
      border: 1px solid #e6e6e6;
      border-radius: 12px;
      padding: 12px 10px;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 10px;
      text-align: center;
      transition: box-shadow 0.3s ease;
    }

    .era-card.highlight {
      background: #f0f9ff;
      border-color: #22b7ff;
      box-shadow: 0 4px 12px rgba(34, 183, 255, 0.12);
    }

    .era-title {
      font-size: 14px;
      font-weight: 700;
      color: #1e2945;
    }

    .icon-grid {
      display: grid;
      gap: 8px;
      width: 100%;
    }

    .icon-grid.past {
      grid-template-columns: repeat(3, 1fr);
    }

    .icon-grid.modern {
      grid-template-columns: repeat(3, 1fr);
    }

    .item-tile {
      background: #ffffff;
      border: 1px solid #e6e6e6;
      border-radius: 8px;
      padding: 6px 2px;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 4px;
    }

    .item-emoji {
      font-size: 22px;
      line-height: 1;
    }

    .item-label {
      font-size: 11px;
      font-weight: 600;
      color: #64748b;
    }

    .flow-connector {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 6px;
      padding: 0 4px;
    }

    .arrow-badge {
      background: #22b7ff;
      color: #ffffff;
      font-size: 12px;
      font-weight: 700;
      padding: 4px 8px;
      border-radius: 12px;
      white-space: nowrap;
    }

    .arrow-line {
      display: flex;
      align-items: center;
      font-size: 20px;
      color: #22b7ff;
      font-weight: bold;
    }

    .interactive-panel {
      width: 100%;
      max-width: 640px;
      margin-top: 12px;
      background: #f8fafc;
      border: 1px solid #e6e6e6;
      border-radius: 12px;
      padding: 12px;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .panel-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .panel-title {
      font-size: 13px;
      font-weight: 700;
      color: #1e2945;
    }

    .toggle-group {
      display: flex;
      gap: 6px;
    }

    .toggle-btn {
      background: #ffffff;
      border: 1px solid #e6e6e6;
      border-radius: 6px;
      padding: 4px 10px;
      font-size: 12px;
      font-weight: 600;
      color: #1e2945;
      cursor: pointer;
      outline: none;
    }

    .toggle-btn.active {
      background: #22b7ff;
      color: #ffffff;
      border-color: #22b7ff;
    }

    .meter-row {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .meter-track {
      width: 100%;
      height: 18px;
      background: #e2e8f0;
      border-radius: 9px;
      overflow: hidden;
      display: flex;
    }

    .meter-fill {
      height: 100%;
      transition: width 0.4s ease;
      display: flex;
      align-items: center;
      justify-content: flex-end;
      padding-right: 8px;
      font-size: 11px;
      font-weight: 700;
      color: #ffffff;
    }

    .fill-past {
      background: #94a3b8;
    }

    .fill-modern {
      background: #0284c7;
    }

    .caption {
      font-size: 12px;
      font-weight: 600;
      text-align: center;
      color: #1e2945;
      margin-top: 4px;
    }

    @media (max-width: 480px) {
      .main-grid {
        grid-template-columns: 1fr;
        gap: 8px;
      }
      .flow-connector {
        flex-direction: row;
        justify-content: center;
      }
      .arrow-line {
        transform: rotate(90deg);
      }
      .item-emoji {
        font-size: 18px;
      }
      .item-label {
        font-size: 10px;
      }
    }
  </style>
</head>
<body>

  <div class="main-grid">
    
    <div class="era-card" id="cardPast">
      <div class="era-title">Past Baseline</div>
      <div class="icon-grid past">
        <div class="item-tile">
          <div class="item-emoji">🛖</div>
          <div class="item-label">Shelter</div>
        </div>
        <div class="item-tile">
          <div class="item-emoji">🌾</div>
          <div class="item-label">Grain</div>
        </div>
        <div class="item-tile">
          <div class="item-emoji">🪵</div>
          <div class="item-label">Tools</div>
        </div>
      </div>
    </div>

    
    <div class="flow-connector">
      <div class="arrow-badge">× Demand</div>
      <div class="arrow-line">➔</div>
    </div>

    
    <div class="era-card highlight" id="cardModern">
      <div class="era-title">Modern Standard</div>
      <div class="icon-grid modern">
        <div class="item-tile">
          <div class="item-emoji">⚡</div>
          <div class="item-label">Power</div>
        </div>
        <div class="item-tile">
          <div class="item-emoji">🚗</div>
          <div class="item-label">Travel</div>
        </div>
        <div class="item-tile">
          <div class="item-emoji">📱</div>
          <div class="item-label">Tech</div>
        </div>
        <div class="item-tile">
          <div class="item-emoji">🍔</div>
          <div class="item-label">Diet</div>
        </div>
        <div class="item-tile">
          <div class="item-emoji">❄️</div>
          <div class="item-label">HVAC</div>
        </div>
        <div class="item-tile">
          <div class="item-emoji">📦</div>
          <div class="item-label">Goods</div>
        </div>
      </div>
    </div>
  </div>

  
  <div class="interactive-panel">
    <div class="panel-header">
      <div class="panel-title">Resource Demand Per Person</div>
      <div class="toggle-group">
        <button class="toggle-btn active" id="btnEnergy" onclick="setMetric('energy')">Energy</button>
        <button class="toggle-btn" id="btnRaw" onclick="setMetric('raw')">Materials</button>
        <button class="toggle-btn" id="btnWaste" onclick="setMetric('waste')">Waste</button>
      </div>
    </div>

    <div class="meter-row">
      <div style="display:flex; justify-content:space-between; font-size:11px; font-weight:600; color:#64748b;">
        <span>Past Baseline: 1×</span>
        <span id="multLabel">Modern: 15× Consumption</span>
      </div>
      <div class="meter-track">
        <div class="meter-fill fill-modern" id="meterFill" style="width: 85%;">85%</div>
      </div>
    </div>
  </div>

  <div class="caption">
    Higher Standard of Living = Greater Resource Consumption per Person
  </div>

  <script>
    const metrics = {
      energy: { width: '88%', label: 'Modern: 18× Consumption' },
      raw: { width: '75%', label: 'Modern: 12× Consumption' },
      waste: { width: '92%', label: 'Modern: 20× Consumption' }
    };

    function setMetric(key) {
      document.getElementById('btnEnergy').classList.toggle('active', key === 'energy');
      document.getElementById('btnRaw').classList.toggle('active', key === 'raw');
      document.getElementById('btnWaste').classList.toggle('active', key === 'waste');

      const data = metrics[key];
      const fill = document.getElementById('meterFill');
      const label = document.getElementById('multLabel');

      fill.style.width = data.width;
      fill.textContent = data.width;
      label.textContent = data.label;
    }
  </script>
</body>
</html>

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>4 Core Positive Conservation Strategies</title>
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      background: #f8fafc;
      color: #0f172a;
      padding: 8px 10px;
      display: flex;
      flex-direction: column;
      gap: 8px;
      user-select: none;
      min-height: 100vh;
      max-height: 590px;
      justify-content: space-between;
    }

    /* Strategy Navigation Buttons */
    .nav-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 6px;
      flex-shrink: 0;
    }
    .nav-btn {
      background: #ffffff;
      border: 1.5px solid #cbd5e1;
      border-radius: 8px;
      padding: 6px 3px;
      font-size: 11px;
      font-weight: 700;
      color: #334155;
      cursor: pointer;
      text-align: center;
      transition: background-color 0.25s ease, border-color 0.25s ease, color 0.25s ease, box-shadow 0.25s ease;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 2px;
      line-height: 1.2;
    }
    .nav-btn:hover {
      background: #f1f5f9;
      border-color: #94a3b8;
    }
    .nav-btn.active {
      border-color: #0284c7;
      color: #0369a1;
      background: #f0f9ff;
      box-shadow: 0 0 0 1.5px #0284c7;
    }

    /* Main Grid Display */
    .grid-container {
      display: grid;
      grid-template-columns: 1fr 1fr;
      grid-template-rows: 1fr 1fr;
      gap: 8px;
      flex: 1;
      min-height: 340px;
      max-height: 460px;
    }

    .panel {
      background: #ffffff;
      border: 1.5px solid #cbd5e1;
      border-radius: 10px;
      padding: 8px 10px;
      position: relative;
      overflow: hidden;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      cursor: pointer;
      opacity: 0.88;
      transition: opacity 0.4s ease, border-color 0.4s ease, background-color 0.4s ease, box-shadow 0.4s ease;
    }
    .panel:hover {
      opacity: 0.98;
      border-color: #94a3b8;
    }
    .panel.highlight {
      opacity: 1;
      border-color: #0284c7;
      background: #f8fafc;
      box-shadow: 0 0 0 1.5px #0284c7, 0 4px 6px -1px rgba(2, 132, 199, 0.12);
    }
    .panel.dimmed {
      opacity: 0.82;
      background: #ffffff;
    }

    .panel-header {
      display: flex;
      justify-content: space-between;
      align-items: flex-start;
      gap: 6px;
      z-index: 2;
    }
    .panel-title {
      font-size: 12px;
      font-weight: 700;
      color: #0f172a;
      line-height: 1.25;
      word-break: normal;
      overflow-wrap: break-word;
      flex: 1;
    }
    .badge {
      font-size: 9.5px;
      font-weight: 700;
      padding: 2px 6px;
      border-radius: 999px;
      white-space: nowrap;
      flex-shrink: 0;
      line-height: 1.2;
    }
    .badge-blue {
      background: #e0f2fe;
      color: #0369a1;
      border: 1px solid #bae6fd;
    }
    .badge-green {
      background: #dcfce7;
      color: #15803d;
      border: 1px solid #bbf7d0;
    }
    .badge-amber {
      background: #fef3c7;
      color: #b45309;
      border: 1px solid #fde68a;
    }
    .badge-rose {
      background: #ffe4e6;
      color: #be123c;
      border: 1px solid #fecdd3;
    }

    .stage {
      flex: 1;
      position: relative;
      display: flex;
      align-items: center;
      justify-content: space-around;
      margin: 4px 0;
      min-height: 62px;
    }

    .panel-caption {
      font-size: 10px;
      line-height: 1.25;
      color: #334155;
      font-weight: 500;
      background: #f1f5f9;
      padding: 4px 6px;
      border-radius: 5px;
      z-index: 2;
    }
    .panel.highlight .panel-caption {
      background: #e0f2fe;
      color: #0369a1;
      font-weight: 600;
    }

    /* Panel 1: Captive Breeding */
    .enclosure {
      width: 44px;
      height: 44px;
      border: 2px dashed #64748b;
      border-radius: 8px;
      background: #f1f5f9;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 19px;
      position: relative;
    }
    .wild-zone {
      width: 52px;
      height: 52px;
      border-radius: 8px;
      background: #dcfce7;
      border: 1.5px solid #4ade80;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: center;
      gap: 2px;
      font-size: 13px;
    }
    .release-particle {
      position: absolute;
      font-size: 15px;
      animation: releaseAnim 4.8s infinite ease-in-out;
    }
    @keyframes releaseAnim {
      0%, 18% { left: 22%; opacity: 0; transform: scale(0.7); }
      32%, 68% { left: 45%; opacity: 1; transform: scale(1.05); }
      82%, 100% { left: 68%; opacity: 0; transform: scale(0.85); }
    }

    /* Panel 2: Hedgerows */
    .habitat-patch {
      width: 42px;
      height: 50px;
      border-radius: 8px;
      background: #ecfdf5;
      border: 1.5px solid #86efac;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      font-size: 13px;
      z-index: 2;
    }
    .hedgerow-bridge {
      position: absolute;
      left: 32px;
      right: 32px;
      height: 15px;
      background: #86efac;
      border: 1.5px dashed #15803d;
      border-radius: 6px;
      z-index: 1;
    }
    .corridor-walker {
      position: absolute;
      font-size: 14px;
      z-index: 3;
      animation: walkAnim 5s infinite ease-in-out alternate;
    }
    @keyframes walkAnim {
      0%, 22% { left: 22%; }
      78%, 100% { left: 66%; }
    }

    /* Panel 3: Peat Bog Rewetting */
    .bog-container {
      width: 100%;
      height: 100%;
      min-height: 64px;
      position: relative;
      border-radius: 6px;
      overflow: hidden;
      background: #fffbeb;
      border: 1px solid #fde68a;
      display: flex;
      flex-direction: column;
      justify-content: flex-end;
    }
    .water-table {
      width: 100%;
      height: 34px;
      background: #0284c7;
      opacity: 0.92;
      display: flex;
      align-items: center;
      justify-content: space-around;
      position: relative;
    }
    .peat-soil {
      width: 100%;
      height: 30px;
      background: #451a03;
      display: flex;
      align-items: center;
      justify-content: space-evenly;
      color: #fef08a;
      font-size: 9.5px;
      font-weight: 700;
    }
    .bog-plant {
      position: absolute;
      top: -15px;
      font-size: 14px;
    }
    .carbon-lock {
      animation: pulseLock 3.8s infinite ease-in-out;
      background: rgba(0, 0, 0, 0.45);
      padding: 1px 5px;
      border-radius: 4px;
      border: 1px solid rgba(254, 240, 138, 0.5);
    }
    @keyframes pulseLock {
      0%, 20%, 80%, 100% { transform: scale(1); opacity: 0.9; }
      45%, 55% { transform: scale(1.06); opacity: 1; }
    }

    /* Panel 4: Marine Quotas & Reserves */
    .reserve-zone {
      width: 54px;
      height: 54px;
      border: 2px solid #dc2626;
      border-radius: 50%;
      background: #e0f2fe;
      position: relative;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .no-take-tag {
      position: absolute;
      top: -8px;
      background: #b91c1c;
      color: #ffffff;
      font-size: 8px;
      font-weight: 800;
      padding: 1px 4px;
      border-radius: 4px;
      letter-spacing: 0.3px;
    }
    .spillover-fish {
      position: absolute;
      font-size: 13px;
      font-weight: 700;
      color: #0369a1;
      animation: spillAnim 4.8s infinite ease-in-out;
    }
    @keyframes spillAnim {
      0%, 18% { left: 36%; opacity: 0.2; transform: scale(0.8); }
      35%, 68% { left: 58%; opacity: 1; transform: scale(1.05); }
      82%, 100% { left: 80%; opacity: 0.1; transform: scale(0.9); }
    }

    /* Interactive Stepper Footer */
    .footer-bar {
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #ffffff;
      border: 1.5px solid #cbd5e1;
      border-radius: 8px;
      padding: 5px 10px;
      gap: 8px;
      flex-shrink: 0;
    }
    .play-btn {
      background: #f1f5f9;
      border: 1px solid #94a3b8;
      border-radius: 6px;
      padding: 4px 10px;
      font-size: 11px;
      font-weight: 700;
      color: #1e293b;
      cursor: pointer;
      transition: background-color 0.2s, border-color 0.2s;
    }
    .play-btn:hover {
      background: #e2e8f0;
      border-color: #64748b;
    }
    .dots-group {
      display: flex;
      gap: 7px;
      align-items: center;
    }
    .dot {
      width: 9px;
      height: 9px;
      border-radius: 50%;
      background: #cbd5e1;
      cursor: pointer;
      transition: background-color 0.25s, transform 0.2s;
    }
    .dot:hover {
      background: #94a3b8;
    }
    .dot.active {
      background: #0284c7;
    }

    @media (max-width: 380px) {
      body {
        padding: 5px 6px;
        gap: 6px;
      }
      .nav-bar {
        gap: 4px;
      }
      .nav-btn {
        font-size: 9.5px;
        padding: 4px 1px;
      }
      .panel {
        padding: 6px 7px;
      }
      .panel-title {
        font-size: 11px;
      }
      .badge {
        font-size: 8.5px;
        padding: 1px 4px;
      }
      .panel-caption {
        font-size: 9px;
        padding: 3px 4px;
      }
    }
  </style>
</head>
<body>

  
  <div class="nav-bar">
    <button class="nav-btn active" id="nav-0" onclick="userSelectStrategy(0)">
      <span>🧬</span>
      <span>Breeding</span>
    </button>
    <button class="nav-btn" id="nav-1" onclick="userSelectStrategy(1)">
      <span>🌿</span>
      <span>Corridors</span>
    </button>
    <button class="nav-btn" id="nav-2" onclick="userSelectStrategy(2)">
      <span>💧</span>
      <span>Rewetting</span>
    </button>
    <button class="nav-btn" id="nav-3" onclick="userSelectStrategy(3)">
      <span>🐟</span>
      <span>Reserves</span>
    </button>
  </div>

  
  <div class="grid-container">

    
    <div class="panel highlight" id="panel-0" onclick="userSelectStrategy(0)">
      <div class="panel-header">
        <span class="panel-title">Captive Breeding</span>
        <span class="badge badge-blue">Gene Pool</span>
      </div>
      <div class="stage">
        <div class="enclosure" title="Controlled Enclosure">🏛️</div>
        <div class="release-particle">🦌</div>
        <div class="wild-zone" title="Wild Ecosystem">
          <span>🌲</span>
          <span>🦌</span>
        </div>
      </div>
      <div class="panel-caption">Preserves genetic diversity & reintroduces species</div>
    </div>

    
    <div class="panel dimmed" id="panel-1" onclick="userSelectStrategy(1)">
      <div class="panel-header">
        <span class="panel-title">Hedgerows</span>
        <span class="badge badge-green">Gene Flow</span>
      </div>
      <div class="stage">
        <div class="habitat-patch" title="Patch A">🌳<br>🦊</div>
        <div class="hedgerow-bridge"></div>
        <div class="corridor-walker">🐝</div>
        <div class="habitat-patch" title="Patch B">🌳<br>🦔</div>
      </div>
      <div class="panel-caption">Connects isolated patches for pollinators & mammals</div>
    </div>

    
    <div class="panel dimmed" id="panel-2" onclick="userSelectStrategy(2)">
      <div class="panel-header">
        <span class="panel-title">Peat Rewetting</span>
        <span class="badge badge-amber">Locked CO₂</span>
      </div>
      <div class="stage">
        <div class="bog-container">
          <div class="water-table">
            <div class="bog-plant" style="left: 14%;">🌾</div>
            <div class="bog-plant" style="left: 68%;">🌱</div>
            <span style="font-size: 10px; color: #ffffff; font-weight: 700; text-shadow: 0 1px 2px rgba(0,0,0,0.5);">💧 Raised Water</span>
          </div>
          <div class="peat-soil">
            <span class="carbon-lock">🔒 CO₂</span>
            <span class="carbon-lock">🔒 CO₂</span>
          </div>
        </div>
      </div>
      <div class="panel-caption">Raises water table to lock carbon & revive bogs</div>
    </div>

    
    <div class="panel dimmed" id="panel-3" onclick="userSelectStrategy(3)">
      <div class="panel-header">
        <span class="panel-title">Marine Reserves</span>
        <span class="badge badge-rose">Nursery</span>
      </div>
      <div class="stage">
        <div class="reserve-zone" title="Protected Nursery Zone">
          <div class="no-take-tag">RESERVE</div>
          <span style="font-size: 17px;">🪸🦐</span>
        </div>
        <div class="spillover-fish">🐟 ➔</div>
        <div style="font-size: 19px; opacity: 0.9;" title="Sustainable Fishery">⛵</div>
      </div>
      <div class="panel-caption">Legal caps protect nurseries & support spillover</div>
    </div>

  </div>

  
  <div class="footer-bar">
    <button class="play-btn" id="playToggle" onclick="toggleAutoPlay()">⏸ Pause</button>
    <div class="dots-group">
      <div class="dot active" id="dot-0" onclick="userSelectStrategy(0)"></div>
      <div class="dot" id="dot-1" onclick="userSelectStrategy(1)"></div>
      <div class="dot" id="dot-2" onclick="userSelectStrategy(2)"></div>
      <div class="dot" id="dot-3" onclick="userSelectStrategy(3)"></div>
    </div>
  </div>

  <script>
    let currentIndex = 0;
    let isPlaying = true;
    let timer = null;
    let lastTransitionTime = 0;

    function applyState(idx) {
      currentIndex = idx;
      const panels = document.querySelectorAll('.panel');
      const navBtns = document.querySelectorAll('.nav-btn');
      const dots = document.querySelectorAll('.dot');

      panels.forEach((p, i) => {
        if (i === idx) {
          p.classList.add('highlight');
          p.classList.remove('dimmed');
        } else {
          p.classList.remove('highlight');
          p.classList.add('dimmed');
        }
      });

      navBtns.forEach((btn, i) => {
        btn.classList.toggle('active', i === idx);
      });

      dots.forEach((dot, i) => {
        dot.classList.toggle('active', i === idx);
      });

      lastTransitionTime = Date.now();
    }

    function selectStrategy(idx) {
      applyState(idx);
    }

    function userSelectStrategy(idx) {
      const now = Date.now();
      if (now - lastTransitionTime < 500) {
        return; // Guard against rapid clicking & flickering
      }
      selectStrategy(idx);
      if (isPlaying) {
        stopTimer();
        startTimer();
      }
    }

    function nextStep() {
      const nextIndex = (currentIndex + 1) % 4;
      selectStrategy(nextIndex);
    }

    function startTimer() {
      // Paced cycle: holds each state for 4000ms
      timer = setInterval(nextStep, 4000);
    }

    function stopTimer() {
      if (timer) {
        clearInterval(timer);
        timer = null;
      }
    }

    function toggleAutoPlay() {
      isPlaying = !isPlaying;
      const btn = document.getElementById('playToggle');
      if (isPlaying) {
        btn.textContent = '⏸ Pause';
        startTimer();
      } else {
        btn.textContent = '▶ Play';
        stopTimer();
      }
    }

    // Initialize Auto-play
    startTimer();
  </script>
</body>
</html>

Evaluating Positive and Negative Human Environmental Actions

Agricultural Practices and Their Impact on Biodiversity

Human Land Use and Habitat Destruction: Quarrying, Urbanisation, and Agriculture

The Ecological Significance and Destruction of Peat Bogs

Deforestation for Timber, Agriculture, and Biofuels in Tropical Regions

Impact of Deforestation and Peat Bog Loss on Atmospheric Carbon Dioxide

Habitat Fragmentation and the Loss of Biodiversity Corridors

science

Negative Human Impacts: Land Use, Peat Bogs, and Deforestation

UK-GCSE-SCIENCE-BIO-ECO-03-02

Aligned learning resources

Related diagrams