Earth Day

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Across
  1. 6. conditions in which something lives
  2. 7. turns waste into usable material
  3. 9. decayed organic material
  4. 10. reuse objects to create a higher quality product
  5. 12. able to be maintained
  6. 14. branch of biology that deals with relation of organisms
  7. 16. unstable toxic gas
  8. 17. no longer in existence
  9. 18. trash left in an open environment
  10. 19. capable of being renewed
Down
  1. 1. relating from living matter
  2. 2. maintain its original state
  3. 3. gases surrounding the earth
  4. 4. a place to dispose of waste material
  5. 5. contaminate with harmful substances
  6. 6. discharge of radiation & gases
  7. 8. interacting organisms in their environment
  8. 11. protect from harm
  9. 13. relating to the sun
  10. 15. natural home or environment