Energy policy of the United States
U.S. wind power installed capacity now exceeds 65,000MW. For calendar year 2014, the electricity produced from wind power in the United States amounted to 181.79 terawatt-hours, or 4.44% of all generated electrical energy. Texas is firmly established as the leader in wind power development, followed by Iowa and California.
Wind power in Iowa
Making up more than 35% of the state's generated electricity, Iowa is a leading U.S. state in wind power generation.
The development of wind power in Iowa began with a state law, enacted in 1983, requiring investor owned utilities purchase 105 MW of power from wind generation. In 2016, over 20 billion kWh of electrical energy was generated by wind power, representing 36.6% of in state electricity production. As of February 2016, Iowa had over 6,974 megawatts (MW) of capacity.