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Actually, hydroelectric and coal-fired power plants produce electricity in a similar way. In both cases a power source is used to turn a propeller-like piece called a turbine, which then turns a ... Take a look at this diagram (courtesy of the Tennessee Valley Authority) of a hydroelectric power plant to see the details:
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ga.water.usgs.gov/edu/hyhowworks.html
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Hydroelectric power for the Nation ... Advantages to hydroelectric power: Fuel is not burned so there is minimal pollution; Water to run the power plant is provided free by nature; Hydropower plays a major role in reducing greenhouse gas emissions; Relatively low operations and maintenance costs;
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ga.water.usgs.gov/edu/wuhy.html
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Worldwide, hydropower plants produce about 24 percent of the world's electricity and supply more than 1 billion people with power. The world's hydropower plants output a combined total of 675,000 megawatts, the energy equivalent of 3.6 billion barrels of oil, according to the National ... Hydroelectric Footwear...
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www.howstuffworks.com/hydropower-plant.htm
www.howstuffworks.com/hydropower-plant.htm
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An additional benefit is that the power is generally available on demand since the flow of water can be controlled. Using hydroelectric power also has disadvantages. Dams can block fish passage to spawning grounds or to the ocean, although many plants now have measures in place to help reduce this impact.
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www.enviroliteracy.org/article.php/59.html
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Hydroelectricity - Wikipedia, the free encyclopedia
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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...
en.wikipedia.org/wiki/Hydroelectricity
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Hydroelectric dams produce significant amounts of CO2 and methane - some produce more greenhouse gases than fossil fuel power plants ... Contrary to popular belief, hydroelectric power can seriously damage the climate. Proposed changes to the way countries' climate budgets are calculated aim to take greenhouse gas...
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www.newscientist.com/article/dn7046
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The first U.S. hydroelectric power plant opened on the Fox River near Appleton, Wisconsin, on September 30, 1882. ... Most hydroelectric power plants have a dam and a reservoir. These structures may obstruct fish migration and affect their populations. Operating a hydroelectric power plant may also change the...
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www.eia.doe.gov/kids/energyfacts/sources/renewable/wate...
www.eia.doe.gov/kids/energyfacts/sources/renewable/water.html
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Only 2,400 of the nation's 80,000 existing dams are used to generate power. Installing turbines in existing dams presents a promising and cost-effective ... Reservoirs formed by hydroelectric dams provide many water-based recreational opportunities including fishing, water sports, boating, and water fowl hunting. (3)
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www.wvic.com/hydro-facts.htm
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