Environmental

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Across
  1. 3. Water turning into vapor
  2. 5. Large-scale cutting of trees
  3. 6. The variety of life in an ecosystem
  4. 7. Gas that plants use for photosynthesis
Down
  1. 1. Process that breaks down dead organisms
  2. 2. Biggest source of energy
  3. 4. Natural fuel like coal or oil