According to the American Wind Energy Association (AWEA) reports, 2009, the U.S. wind energy industry to achieve unprecedented rapid growth, adding 9,922 megawatts of generating capacity, enough to more than 2.4 million American families to provide clean energy. AWEA reports that in 2009, the U.S. wind and gas power generation is the main source of new power, the two together account for about 80% of new installed capacity. Wind energy industry’s rapid growth is mainly due to the promulgation in 2009 of “USA Recovery and Reinvestment Act.”

One of the beneficiaries of wind energy wind generator manufacturing industry. Last year, the U.S. wind energy machinery wind turbines manufacturing increased by 39%. Currently, the U.S. total wind power installed capacity of more than 35,000 megawatts, equivalent to 9.7 million households with electricity. 5-year wind industry average annual growth rate of 39% (2003 -2008 period, 32%).

To wind power as alternative energy natural gas is estimated to reduce annual Great

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