Across
- 7. you breathe
- 9. alot of people to build
- 11. to find
- 12. used to make stuff
- 13. thing that you can swim in
- 14. word for rocks
- 15. to power cars
- 16. take a while to make
- 17. from renewable resources
- 19. power/something also powered by the sun
Down
- 1. to make
- 2. hard to make
- 3. to make
- 4. thing for plants
- 5. takes a year to form
- 6. hard to make
- 8. thing to heat earth
- 10. gas/used to make stuff
- 13. power/a thing powered by the sun
- 18. to gasoline