Across
- 2. Energy from the sun
- 3. Turn food waste into this
- 6. What we should keep the environment
- 7. Ride this to save fuel
- 8. Forests, rivers, animals, and sky
Down
- 1. What we should do with trees
- 4. What trees give us
- 5. What we do with electricity and water
- 9. Where waste goes
- 10. Use something again