Renewable energy

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Across
  1. 4. An organization that provides any combination of consulting
  2. 5. specialized semiconductor diode that converts visible light into direct current
  3. 8. a form of energy obtained from within the earth
  4. 10. central building heating and/or cooling system that takes advantage of the relatively constant year-round ground temperature to pump heat to or from the ground.hydropower
  5. 11. a turbine having a large vaned wheel rotated by the wind to generate electricity.
  6. 12. a group of wind turbines in the same location used to produce electricity
Down
  1. 1. the least expensive way to heat your home
  2. 2. is a form of hydropower that converts the energy obtained from tides into useful forms of power, mainly electricity
  3. 3. uses mechanical and electrical equipment
  4. 6. chemical decomposition produced by passing an electric current through a liquid or solution containing ions.
  5. 7. energy from burning vegetation
  6. 9. a fuel derived directly from living matter