Across
- 1. clean air
- 6. invernadero
- 8. environment
- 11. planet
- 14. natural resource
- 15. climate
- 16. research
- 18. ozone layer
- 19. deforestation
Down
- 2. erosion
- 3. flood
- 4. earthquake
- 5. nonrenewable
- 7. development
- 9. innovation
- 10. landslide
- 12. oil
- 13. biodiversity
- 17. pollution