In this July 28, file 2014 photo, two donkeys run through a pasture in front of wind turbines in Calumet, Okla. Tax incentives and subsidies provided by the state to wind energy producers were created when the industry was in its infancy and may need to be re-examined in light of the growing cost to the state treasury, the head of a wind industry trade group told members of a Senate panel on Tuesday. (AP Photo/Sue Ogrocki, File)
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