Natural Resource

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Across
  1. 3. burning the natural gas () the air
  2. 6. from plants and animals
  3. 9. energy from water
  4. 10. to re-use or to give a new purpose
  5. 12. energy from the sun
  6. 14. a replaceable resource
  7. 16. (gold, diamond, copper)
  8. 17. ball of fire
  9. 19. (power)
Down
  1. 1. a useful object to create things
  2. 2. from trees
  3. 4. not replaceable
  4. 5. synonym (material)
  5. 7. heat from the earth
  6. 8. (coal, gas, oil)
  7. 11. to protect or keep safe
  8. 13. the amount of () was harmful to the earth
  9. 15. in the air
  10. 18. also in the air