Earth Day

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Across
  1. 6. the surroundings or conditions in which a person or thing lives in
  2. 7. convert to reuseable material
  3. 9. decay of organic material used as a plant fertilizer
  4. 10. reuse in a way to make it higher quality
  5. 12. able to be maintained
  6. 14. the study of organisms
  7. 16. a colorless gas made up of 3 oxygen molecules
  8. 17. no longer alive
  9. 18. trash on the ground
  10. 19. a resource that is replenished naturally
Down
  1. 1. things that are natural or related to nature
  2. 2. keep longer
  3. 3. the gases surrounding the Earth
  4. 4. where garbage goes
  5. 5. contaminate
  6. 6. the production and discharge of gas or radiation
  7. 8. a biological community of organisms and environment
  8. 11. protect
  9. 13. sun rays as a source of energy
  10. 15. where animals live