Across
- 1. sky
- 3. deforestation
- 4. valley
- 9. nature
- 11. to recycle
- 13. palm tree
- 15. jungle
- 17. natural resources
- 20. sand
- 25. grass, pasture
- 26. to take care of
- 28. island
- 32. oil
- 33. smog
- 34. recycling
- 35. it is necessary
- 37. peninsula
- 39. to destroy
- 40. tree
- 41. pollution
- 42. cactus
- 43. river
- 45. coast
Down
- 2. grasslands
- 4. sea
- 5. hill
- 6. Earth
- 7. cloud
- 8. to save, economize
- 10. mountain
- 12. a large waterfall
- 14. wave
- 16. plain
- 18. volcano
- 19. to save
- 21. environment
- 22. should, ought to
- 23. desert
- 24. to clean
- 27. ecology
- 29. to have to
- 30. to protect
- 31. industrial waste
- 36. to preserve
- 38. a small waterfall
- 40. forest
- 44. bay