Environmental issues

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Across
  1. 2. The mark or effect that something leaves behind
  2. 4. Environmentally friendly
  3. 5. Use again
  4. 6. Something that is no longer used or wanted
  5. 7. Process something to make it usable again
Down
  1. 1. The air, water, and land around us all
  2. 3. Make an amount or number smaller
  3. 5. Things that are available to be used