Crossword Time!

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Across
  1. 1. To convert into reusable material
  2. 5. Cutting down trees
  3. 6. Who said “What is vice today may be virtue tomorrow”?
  4. 8. What substance takes 800 years to decompose?
  5. 9. The human-induced warming of the Earth
  6. 11. Where is smoke pollution a major problem?
Down
  1. 2. Loose trash
  2. 3. Able to decompose naturally
  3. 4. A layer of gas that protects the Earth
  4. 5. Where does trash go?
  5. 7. What stationary supply do trees make?
  6. 10. What provides oxygen for us?