Across
- 2. To protect and keep safe in its original state
- 6. Plants grow from this
- 7. Keep in good condition
- 9. Layer of gases between Earth and space
- 10. Our surroundings
- 12. Help out or serve others in a selfless way
- 14. An object that can decompose naturally
- 16. type of habitat with lots of rain, usually in tropical areas
- 17. Use again
Down
- 1. An "effect" where heat is trapped due to ozone
- 3. Make something new out of something old
- 4. Place where plants and animals live
- 5. To use less so there is some in the future
- 8. introduction of harmful materials into the environment
- 11. Type of species that needs protection
- 13. to return something to an earlier state
- 15. Name of our planet