Across
- 3. glacier
- 5. air
- 9. to be extinct
- 12. flood
- 15. spill
- 16. to contaminate / to pollute
- 18. natural disasters
- 20. earthquake
Down
- 1. to threaten
- 2. smog
- 4. pesticides
- 6. natural resources
- 7. hurricane
- 8. drought
- 10. factory
- 11. habitat
- 13. deforestation
- 14. to become aware of
- 17. to melt
- 19. to appreciate/to value