crossword puzzle jackson 13

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Across
  1. 3. able to be maintained or supportive
  2. 5. cutting down trees to clear the land
  3. 7. liquids that harm nature
  4. 8. fresh
Down
  1. 1. protection of the environment
  2. 2. able to be reused
  3. 4. keeping nature safe
  4. 6. risk of extinction