POLLUTION/ENVIRONMENT

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Across
  1. 3. the variety of plants and animals in an area
  2. 5. to influence something
  3. 6. rain rain that contains harmful chemicals
  4. 7. the result of an action
  5. 9. pollution dirty air caused by smoke and gases
  6. 10. monoxide a dangerous gas produced by engines
  7. 11. tiny dry particles floating in the air
  8. 12. the layer of gases surrounding the Earth
  9. 13. too many vehicles causing traffic jams
  10. 15. a sudden event that causes lots of damage
  11. 18. a breathing problem often made worse by pollution
  12. 19. material that can break down naturally
Down
  1. 1. change long-term changes in global temperature
  2. 2. the ___ of rivers makes the water unsafe
  3. 4. dioxide the gas released when humans breathe out
  4. 8. a community of living things and their environment
  5. 11. causing great harm or damage
  6. 14. cutting down large areas of trees
  7. 16. the release of gas or smoke into the air
  8. 17. a substance used in industry or cleaning