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