Earth Day

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Across
  1. 4. The introduction of harmful materials into the environment.
  2. 5. Protect from harm or destruction.
  3. 7. Trash that is left lying in the open or in public.
  4. 9. The natural home or environment of an organism.
  5. 10. A biological community of interacting organisms.
Down
  1. 1. Decayed organic material used as a planet fertilizer.
  2. 2. The sun's rays as energy to power things.
  3. 3. Maintain in its original or existing state
  4. 6. The mixture of gases surrounding a planet.
  5. 8. A system of trash and garbage disposal in which the waste is buried.