Renewable energy

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Across
  1. 4. organic matter used as a fuel
  2. 5. cars that use gas and electricity
  3. 8. a dynamo or similar machine for converting mechanical energy into electricity.
  4. 9. a sluice or floodgate for regulating the flow of a body of water.
  5. 11. relating to or denoting the generation of electricity using flowing water
  6. 15. relating to the production of electric current at the junction of two substances exposed to light.
  7. 17. a large natural or artificial lake used as a source of water supply.
  8. 18. a gas that’s naturally released
  9. 19. an installation where electrical power is generated for distribution.
Down
  1. 1. a machine for producing continuous power
  2. 2. a type of biomass
  3. 3. the use of the sun's energy directly for either heating or cooling purposes.
  4. 5. hydroelectric power plant
  5. 6. relating to or determined by the sun.
  6. 7. biodegradable
  7. 10. a colourless, odourless, tasteless, flammable gaseous substance
  8. 12. a barrier constructed to hold back water and raise its level
  9. 13. relating to or produced by the internal heat of the earth.
  10. 14. Ocean thermal energy conversion
  11. 16. Horizontal axis wind turbine