Ecology – Human Impact

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Across
  1. 4. Damage caused to soil by wind or water.
  2. 5. The layer of gases surrounding Earth.
  3. 8. the warming of Earth caused by greenhouse gases.
  4. 9. Fuels such as coal, oil, and natural gas.
  5. 12. The disappearance of a species forever.
  6. 13. The destruction of natural environments where organisms live.
  7. 15. The protection of endangered animals and plants.
  8. 16. When a place dries out
  9. 17. Waste material that contaminates the environment.
  10. 18. The overuse of Earth’s natural resources.
Down
  1. 1. Animals or plants brought to a new area that harm native species.
  2. 2. Energy produced by moving wind.
  3. 3. Materials that break down naturally in the environment.
  4. 6. The variety of living organisms in an area.
  5. 7. The natural home of an animal or plant.
  6. 10. Farming or building over natural land.
  7. 11. Reusing materials instead of throwing them away.
  8. 14. Cutting down large areas of trees.