Earth Day

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Across
  1. 2. Variety of life
  2. 4. Gases that surround our planet
  3. 5. Converting waste into usable materials
  4. 6. When no members of a species remain
  5. 7. To use items more than once
  6. 10. A group of organisms that can mate with each other
Down
  1. 1. To use less of something
  2. 3. Excessive use of natural materials
  3. 8. The surroundings of an organism(s)
  4. 9. Species in danger of extinction