energy sources

1234567891011121314
Across
  1. 2. finite
  2. 3. water
  3. 7. make something old into something useful
  4. 9. sun
  5. 11. infinite
  6. 13. gas
  7. 14. protecting
Down
  1. 1. contamination
  2. 4. cut back
  3. 5. nukes
  4. 6. use again
  5. 8. is very old
  6. 10. air
  7. 12. animals