Across
- 5. - Something that breaks down naturally
- 9. - The warming of the Earth’s air
- 11. - A place where plants and animals live
- 13. - Dirty air in the city
- 14. - Repeated clue for emphasis
- 17. - Animals in nature
- 18. - Hot Earth energy
- 21. - Big energy
- 23. - A gas
- 24. - A place with water and land
- 25. - Use it again
- 30. - To clean something dirty
- 32. - Air around Earth
- 34. - Power to do things
- 35. - Energy you can use again and again
- 36. - Many different animals and plants
- 37. - Something that comes out of a car or factory
- 39. - Food without chemicals
- 40. - Person who helps nature
Down
- 1. - Related to water
- 2. - An animal in danger
- 3. - Something that can make you sick
- 4. - From the sun
- 6. - Air in the sky that protects Earth
- 7. - You use it one time and it is gone
- 8. - Something that makes things dirty
- 10. - The study of nature
- 12. - An animal’s home
- 15. - Many different kinds of things
- 16. - Trash place
- 19. - An animal
- 20. - Oil from the ground
- 22. - To make something smaller
- 26. - Protecting resources
- 27. - Something to kill bugs
- 28. - Things you throw away
- 29. - Water wears land away
- 31. - Something to kill plants
- 33. - Dangerous energy
- 34. - An animal that is gone forever
- 38. - Good for nature