• Once a hydroelectric complex is constructed, the project produces no direct waste, and has a considerably different output level of the greenhouse gas carbon dioxide (CO2) than fossil fuel powered energy plants (significant amounts of GHG are release during the construction when forests are flooded and gas such as methane emitted during the decay of organic matter)
• Worldwide, hydroelectricity supplied an estimated 715,000 MWe in 2005. This was approximately 19% of the world's electricity (up from 16% in 2003), and accounted for over 63% of electricity from renewable sources.
• Hydroelectric plants however have significant impacts on biodiversity and are therefore considered my many environmentalists not to be eco-friendly.
Source of Information : Climate Change: A Silent Threat by Sylvain Richer de Forges
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