Earth Day(extra credit)

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Across
  1. 5. The disposal of refuse and other waste material by burying it and covering it over with soil
  2. 6. The envelope of gases surrounding the earth or another planet
  3. 8. The process of converting waste materials or useless products into new materials or products of better quality or a higher...
  4. 9. Capable of being renewed
  5. 11. The production and discharge of something
  6. 12. Able to be maintained at a certain rate or level
  7. 14. Protect (something, esp. an environmentally or culturally important place or thing) from harm or destruction
  8. 16. Maintain (something) in its original or existing state
Down
  1. 1. Decayed organic material used as a plant fertilizer
  2. 2. Trash, such as paper, cans, and bottles, that is left lying in an open or public place
  3. 3. Contaminate (water, air, or a place) with harmful or poisonous substances
  4. 4. The natural home or environment of an animal, plant, or other organism
  5. 7. The surroundings or conditions in which a person, animal, or plant lives or operates
  6. 10. A colorless unstable toxic gas with a pungent odor and powerful oxidizing properties, formed from oxygen by electrical discharges or..
  7. 12. energy derived from the sun's rays
  8. 13. A biological community of interacting organisms and their physical environment
  9. 15. Of, relating to, or derived from living matterecology
  10. 17. Convert (waste) into reusable material
  11. 18. No longer in existence