Across
- 2. brownish haze brownish produced
- 4. must be recovered with soil
- 5. save
- 7. deposits of materials
- 10. wind turbines
- 11. electricity, flowing water
- 12. burning organic matter
- 14. Earth's material
Down
- 1. used faster than they can be replaced
- 3. has a pH less than 5.6
- 4. protect people
- 6. can be replaced by natural processes
- 8. cutting of large areas of forest
- 9. from the sun
- 13. atomic reactions