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Sierra Club information on Wind Energy Wind Energy Wind energy is the fastest-growing source of power in the world. With our tremendous wind resources, the United States can become a world leader in wind energy. Today, there are more than 61 gigawatts of installed wind capacity, enough to provide electricity to 15 million American homes. States like Iowa and South Dakota already get 20 percent of their power from wind, and the Department of Energy says that we can get 20 percent of our power as a nation from wind energy alone by 2030. As a growing power source, wind energy provides a major economic development opportunity. In some parts of the country, farmers harness the wind and sell the extra energy they generate for a profit, and wind farm development brings construction jobs, leasing royalties, and increased tax revenues to local communities. Wind energy plays an important role in fighting climate change and weaning us off fossil fuels.