Environment

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Across
  1. 4. atmosphere
  2. 9. threaten
  3. 10. exhaust-fumes
  4. 11. pollution
  5. 12. landfill
Down
  1. 1. clean-up
  2. 2. chemicals
  3. 3. waste
  4. 5. reusable
  5. 6. carbon-footprint
  6. 7. dispose
  7. 8. harmful