Earth day

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Across
  1. 1. discharge of something
  2. 4. the original or existing state.
  3. 9. living organisms
  4. 10. chemical formula
  5. 12. relating to or derived from living matter
  6. 13. where animals live
  7. 15. reuse them again and again
  8. 16. create a product of higher quality or value than the original.
  9. 18. poison gas or air
  10. 20. certain rate or level
Down
  1. 2. determined by the sun
  2. 3. protection from harm or danger
  3. 5. surrounding of humans and animals
  4. 6. study of living organisms
  5. 7. gases surrounding the earth or another planet
  6. 8. burying dispose
  7. 11. no longer lives
  8. 14. capable of being renewed
  9. 17. plant fertilizer
  10. 19. trash in the ground in public places