renewable energy

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Across
  1. 2. filters
  2. 3. uses a lot of
  3. 5. a large structure that uses wind power
  4. 7. don't have a lot of
  5. 8. creates
  6. 13. a biofuel made from corn or sugarcane
  7. 15. cleans the
  8. 16. need a lot of
  9. 17. improves the
  10. 19. a structure that uses water currents to produce electricity
  11. 20. a biofuel made from animal manure
Down
  1. 1. renewable energy lasts
  2. 4. manufacturing produces a lot of carbon
  3. 5. depends on
  4. 6. costs a lot of
  5. 9. a device that uses the sun to produce electricity
  6. 10. electricity made from the natural heat of the Earth
  7. 11. a structure built across a stream or river and can be used for electricity production
  8. 12. a biofuel made from vegetable and animal fats
  9. 14. they destroy
  10. 18. a resource that is used for fire and can be replanted