Altervative Energy Crossword

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Across
  1. 3. a form of hydropower that converts the energy of tides into useful forms of power
  2. 4. resources that are not sustainable because their formation takes billions of years.
  3. 6. pollutants that have an identifiable origin
  4. 8. materials or substances such as minerals, forests, water, and fertile land that occur in nature
  5. 10. a panel designed to absorb the sun's rays as a source of energy for generating electricity or heating.
  6. 12. waves emitted by the sun
  7. 13. the production of electrical power through the use of the gravitational force of falling or flowing water.
  8. 14. the harvesting of the earths underground heat for power.
  9. 17. resources that are sustainable because their formations don't takes billions of years.
  10. 19. a gradual increase in the overall temperature of the earth's atmosphere generally attributed to the greenhouse effect caused by increased levels of carbon dioxide
Down
  1. 1. power obtained by harnessing the energy of the wind.
  2. 2. a natural fuel such as coal or gas, formed in the geological past from the remains of living organisms and take billions of years to replenish
  3. 4. pollutants that have no specific origin
  4. 5. electric or motive power generated by a nuclear reactor.
  5. 7. flammable gas occurring naturally underground and used as fuel.
  6. 9. power obtained by harnessing the energy of the sun's rays.
  7. 11. a gas that contributes to the greenhouse effect by absorbing infrared radiation
  8. 15. a turbine having a large vaned wheel rotated by the wind to generate electricity.
  9. 16. convert a recyclable materials into something else
  10. 18. preservation, protection, or restoration of the natural environment, natural ecosystems, vegetation, and wildlife