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  • Life On Earth
    • Human Impact
      • OverFishing
      • OverHunting
      • Deforestation
      • Pollution (air and water)
      • Global Warming
      • Desertification
      • Endangered Species
    • Algal Blooms
      • 2.This reduces light levels killing aquatic plants
    • GM Crops
      • Crops produced that have had specific changes introduced into their DNA -
        • -using methods of genetic engineering.
  • 1. Fertilisers can leach into fresh water.
    • 2.This reduces light levels killing aquatic plants
    • 3. The dead aquatic plants and the dead algae become food for bacteria
      • 4. The bacteria increase in number.
        • 5. the bacteria use up large quantities of oxygen.
          • 6. This reduces the oxygen available to other organisms.
  • Pesticides are chemicals used by farmers to protect their crops.
    • from attack by pests and diseases and competition from other plants.
    • Pesticides
      • Life On Earth
        • Human Impact
          • OverFishing
          • OverHunting
          • Deforestation
          • Pollution (air and water)
          • Global Warming
          • Desertification
          • Endangered Species
        • Algal Blooms
          • GM Crops
            • Crops produced that have had specific changes introduced into their DNA -
              • -using methods of genetic engineering.

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