energy source

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Across
  1. 3. the presence in or introduction into the environment of a substance
  2. 8. convert (waste) into reusable material.
  3. 9. prevention of wasteful use of a resource.
  4. 10. source of energy that is not depleted by use
  5. 12. the generation of electricity using flowing water
  6. 13. organic matter is used as a fuel
  7. 14. again or more than once.
Down
  1. 1. natural fuel
  2. 2. mostly use by wind turbines
  3. 4. resource or source of energy.
  4. 5. he radiation from the Sun capable of producing heatmostly
  5. 6. heat within the earth
  6. 7. controlled use of nuclear power
  7. 11. make smaller or less in amount, degree, or size