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The chief environmental effect of wind energy is the reduction in pollution that results from displacing fossil-fired electricity generation. To the extent that intermittent and variable energy supply can replace conventional energy sources, wind energy's environmental costs can be much lower.Answers.com

Energy derived from Wind_powerconsumes no fuel, and emits no Air_pollution, unlike fossil fuel power sources. Advocates contend that the energy consumed in manufacturing and transporting the materials used to build a wind power plant is paid back within months, quicker than for a nuclear power plant.Answers.comAnswers.comSome studies, however, conclude that, for the amount of power generated, the resources used to construct wind turbines are greater than those needed for nuclear plants, making the energy requirements and greenhouse-gas emissions for wind turbines higher.Answers.com

While a wind farm may cover a large area of land, advocates point out that many land uses such as agriculture are compatible with only small areas of turbine foundations and infrastructure made unavailable for use.Answers.com

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