Our Environment & Pollution

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Across
  1. 3. used to purify water (6)
  2. 4. gas used in air conditioners (5)
  3. 6. burning this causes pollution (4)
  4. 8. water release when the glacier melts (9)
  5. 9. one of the biggest holes in atmosphere (5)
  6. 12. Used for producing batteries (7)
  7. 13. source of emission from agriculture (6)
  8. 15. used for keeping swimming pools clean (8)
  9. 16. example of a clean gas
  10. 18. heat from inside of earth (10)
  11. 19. 7 letter word for green energy
Down
  1. 1. abundant source of energy (5)
  2. 2. waster water from domestic usage (6)
  3. 5. Mix of this & petrol makes fuel better (7)
  4. 7. a dangerous contaminant in ground water (4)
  5. 8. example of green house gas (7)
  6. 10. this ocean had the largest oil spill (8)
  7. 11. another word for reuse (7)
  8. 14. technology of tomorrow (8)
  9. 17. #1 cause of pollution today (7)