Across
- 4. air
- 6. drinking water
- 7. global warming
- 10. wild animal
- 11. wind (power) farm
- 14. Garbage
- 16. catastrophe
- 17. ozone layer
- 19. climate change
- 20. biodiversity
Down
- 1. heavy downpour
- 2. global warming
- 3. nuclear power station
- 5. campaign
- 8. fresh air
- 9. atmosphere
- 12. forest
- 13. shower
- 15. threat
- 18. rainbow