Pingie: HTTP:: Largest Dam in the World Is a Potent Methane Source

HTTP:: Largest Dam in the World Is a Potent Methane Source
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China has finished building the largest hydroelectric plant in the world, the 7,661-foot-long Three Gorges Dam, on the Yangtze River, only for a short time. Elevated to the rank of national symbol, the dam has already come under criticism from environmentalists, who say that it may be a potent methane source. During the summer, as its 1,045-square-kilometer reservoir is half emptied, large areas of marshlands are formed. These terrains then start emitting methane at alarmingly high rates, experts say. The Three Gorges Dam reservoir is impressive in size. When filled, it spans about 660 kilometers (410 miles) in length and 1.12 kilometers (0.70 miles) in width, on average. It also contains about 39.3 cubic kilometers (9.4 cubic miles) of water, which it collects from a catchment area of 1,000,000 square kilometers, or about 386,102 square miles. According to a new study, published in the latest issue of the respected Journal of Geophysical Research, the hydroelectric power !
plant, which is advertised as a green power source, is a living example of the adverse effects that some green technologies can indirectly have on the environment. The reason why methane and carbon dioxide are released from marshlands is fairly simple. When the dam is closed for the first time, the area behind it floods with wate...
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http://news.softpedia.com/news/Largest-Dam-in-the-World-Is-a-Potent-Methane-Source-123018.shtml
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