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Hydrogen so far has not proven to be a very profitable energy source since it takes more energy to manufacture than the hydrogen actually produces. It is,  a very good fuel for the environment and has turned out to be a good energy source for vehicles. http://www.dailymail.co.uk/sciencetech/article-1033683/Fill-car--home-hydrogen-fuel-station.html

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Biofuels are fuels that are made from animals or plants. They may include methane gas from animal waste, wood chippings, or wood. Today ethanol has been getting a lot of attention for its use in combination with gasoline for transportation use. http://www.energybc.ca/profiles/biofuels.html

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Hydroelectric power is generated from dammed water that drives a water turbine and generator. Tidal power is one version of this. The power of the water of a tide creates pressure that will turn either a turbine or a water wheel. This power then is able to provide energy to the electric generator. www.doe.gov

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Literally, geothermal means, "earth heat." Geothermal energy harnesses the heat energy present underneath the Earth. Hot rocks under the ground heat water to produce steam. When holes are drilled in the region, the steam that shoots up is used to drive turbines, which power electric generators. http://i.ytimg.com/vi/Rs6n0baLQ6w/maxresdefault.jpg

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Solar energy is used commonly for heating, cooking, the production of electricity, and even in the desalination of seawater. Solar power works by trapping the sun's rays into solar cells where this sunlight is then converted into electricity. Additionally, solar power uses sunlight that hits solar thermal panels to convert sunlight to heat water or air.
www.doe.gov

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Wind energy harnesses the power of the wind to propel the blades of wind turbines. The rotation of turbine blades is converted into electrical current by means of an electrical generator.
www.energy.gov