Earth Day

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Across
  1. 1. H2O
  2. 6. to save use of
  3. 9. to make less dirty
  4. 10. to use again
Down
  1. 2. to use as something else
  2. 3. the body that spins in space
  3. 4. big body of water
  4. 5. to keep safe
  5. 7. power to do things
  6. 8. to use less