Earth Day

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Across
  1. 2. trash in public places
  2. 5. decayed organic material
  3. 6. maintain something in its current state
  4. 7. gases that surround Earth
  5. 9. a place to put trash
Down
  1. 1. the home of plants and animals
  2. 3. a community of interacting organisms and their environment
  3. 4. reuse and change in a way that increases value or quality
  4. 5. protect
  5. 8. the study of organisms and how they relate to each other