Across
- 2. material made from trees
- 7. energy from moving air
- 8. energy from the sun
- 10. harmful substances
- 11. plants, animals, and the Earth
- 12. dirty air from cars or fires
- 13. use old things again
Down
- 1. dirty air, water, or land
- 3. use less of something
- 4. use something more than one time
- 5. man-made material that pollutes
- 6. hard, clear material for bottles
- 7. things we throw away
- 9. power we use