Hydroelectricity
From Wikipedia, the free encyclopedia
Hydroelectricity is electricity generated by hydropower, i.e., the production of power through use of the
gravitational force of falling or flowing water. It is the most widely used
form of renewable energy. Once a hydroelectric complex is constructed,
the project produces no direct waste, and has a considerably lower output level
of the greenhouse gas carbon dioxide (CO2)
than fossil fuel powered
energy plants. Worldwide, hydroelectricity supplied an estimated 816 GWe in 2005.
This was approximately 20% of the world's electricity, and accounted for about
88% of electricity from renewable sources.
