Across
- 3. to reuse trash
- 5. trash in public
- 6. the production and discharge of something
- 7. able to be maintained at a certain rate
- 9. dead organic things for plant fertilizer environment surroundings or conditions animals live in
- 10. no longer in existence
- 12. a colorless unstable toxic gas
- 13. relating to or derived from living matter
- 15. relating to or determined by the sun
- 16. capable of being renewed
- 18. gases surrounding the earth
- 19. a biological community
Down
- 1. contaminate with harmful substances
- 2. maintain in its original or existing state
- 4. branch of biology relations of organisms
- 8. make reuse trash to make it worth more
- 11. protect from harm or destruction
- 14. putting trash and waste under ground
- 17. the natural home of animals and plants