World Earth Day Puzzle

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Across
  1. 3. The more it is used, the more trees are felled
  2. 4. Where we live that must be preserved
  3. 7. Useful to humans but harmful for aquatic life
  4. 8. Inhaled to enable humans live
Down
  1. 1. A term used to describe damage to the environment and the earth
  2. 2. Transform from one form to another
  3. 5. The cheapest method of managing waste
  4. 6. Covers 71% of the earth