Hydroelectricity is the term referring to electricity generated by hydropower the production of electrical power through the usebof the gravitational force of falling through dam or flowing water rumn of the river. It is the most widely used from of renewable energy accounting for 16 percent of global electricity consumption and 3,427 terawatt hours of electricity production in 2010 which continue the rapid of increase experienced between 2003 and 2009.
Hydropower is produced in 150 countries with the Asia Pacific region generating 32 percent of global hydropower in 2010 China is the largest hydroelectricity producer with 721 terawatt hours of production in 2010 representing around 17 percent of domestic electricity use. There are now three hydroelectricity plants larger than 10GW: Three Gorges dam in China, Itaipu dam in Brazil and Guri dam in Venezuela.
Wind power:
Wind power is growing at the rate of 30% annually with a worldwide installed capacity of 238,351 megawatts MW at the end of 2011 and is widely used in Europe Asia and the United's States. Several countries have achieved relatively high levels of wind power penetration such as 21% of stationary electricity production in Denmark 18% in Portugal 16% in Spain 14% in Ireland and 9% in Germany in 2010. As of 2011 83 countries around the world are using wind power on a commercial basis.
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