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