A wind turbine farm owned by PacifiCorp stands near Glenrock, Wyo., Monday, 

A wind turbine farm owned by PacifiCorp stands near Glenrock, Wyo., Monday, May 6, 2013.  Wind farms owned by the company, with clusters of turbines as tall as 30-story buildings and spinning rotors the size of jetliners, have killed at least 20 eagles in the state, according to data obtained by The Associated Press. It's the not-so-green secret of the nation's wind-energy boom: Spinning turbines are killing thousands of federally protected birds, including eagles, each year. (AP Photo/Matt Young)
Associated Press
A wind turbine farm owned by PacifiCorp stands near Glenrock, Wyo., Monday, May 6, 2013. Wind farms owned by the company, with clusters of turbines as tall as 30-story buildings and spinning rotors the size of jetliners, have killed at least 20 eagles in the state, according to data obtained by The Associated Press. It's the not-so-green secret of the nation's wind-energy boom: Spinning turbines are killing thousands of federally protected birds, including eagles, each year. (AP Photo/Matt Young)
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