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