eco

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Across
  1. 3. make pollution
  2. 7. rubbish in the water
  3. 8. bad dirt
Down
  1. 1. Unwanted sound
  2. 2. burn to make cars move
  3. 4. kills animals
  4. 5. occurs when dangerous gases, are released
  5. 6. burns trees and makes co2
  6. 9. make co2 to o2