Across
- 5. clean air
- 7. ground, soil
- 8. risk
- 10. flood
- 11. natural resource
- 12. smog
- 15. pollution, contamination
- 17. environment
- 19. ozone layer
- 20. deforestation
Down
- 1. drougth
- 2. oil
- 3. climate
- 4. biodiversity
- 6. garbage conatiner
- 9. greenhouse effect
- 13. earthquake
- 14. erosion
- 16. nonrenewable
- 18. landslide