Renewable energy

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Across
  1. 2. combines multiple types of energy generation and/or storage or uses two or more kinds of fuel to power a generator
  2. 8. a panel designed to absorb the sun's rays as a source of energy for generating electricity or heating
  3. 10. turbine a turbine having a large vaned wheel rotated by the wind to generate electricity
  4. 11. an energy harvesting technology, that converts solar energy into useful electricity through a process
  5. 13. energy from a source that is not depleted when used, such as wind or solar power
  6. 14. relating to or produced by the internal heat of the earth
  7. 16. a colorless, odorless flammable gas which is the main constituent of natural gas. It is the simplest member of the alkane series of hydrocarbons
  8. 19. relating to or denoting the generation of electricity using flowing water (typically from a reservoir held behind a dam or other barrier) to drive a turbine that powers a generator
  9. 20. gaseous fuel, especially methane, produced by the fermentation of organic matter
Down
  1. 1. power obtained by harnessing the energy of the wind
  2. 3. a biofuel intended as a substitute for diesel
  3. 4. organic matter used as a fuel, especially in a power station for the generation of electricity
  4. 5. use solar energy to heat a fluid -- either liquid or air and then transfer the solar heat directly to the interior space or to a storage system for later use
  5. 6. a building with sails or vanes that turn in the wind and generate power to grind grain into flour
  6. 7. the use of the sun's energy directly for either heating or cooling purposes
  7. 9. the generation of electricity and other energy jointly, especially the utilization of the steam left over from electricity generation to produce heat
  8. 12. renewable source of energy that generates power by using a dam or diversion structure to alter the natural flow of a river or other body of water
  9. 15. an area of land with a group of energy-producing windmills or wind turbines
  10. 17. a machine for producing continuous power in which a wheel or rotor, typically fitted with vanes, is made to revolve by a fast-moving flow of water, steam, gas, air, or other fluid.
  11. 18. the sun's rays as a source of energy from which power for domestic or industrial use may be generated