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Associated Press
In this photo 2014 photo provided by Abengoa, a load of biomass, agricultural crop residues, is delivered to Abengoa's biorefinery in Hugoton, Kan. The plant, built by Seville, Spain-based Abengoa, is the largest cellulosic biorefinery in the world, producing up to 25 million gallons of ethanol fueled by non-edible waste. The Hugoton cellulosic ethanol refinery was funded in part by a loan guarantee from the Department of Energy. The same program funded high profile flops like Solyndra, the California-based solar company that filed for bankruptcy and led to hearings over the Barack Obama administration’s backing of unproven green-energy projects.(AP Photo/Courtesy Abengoa)

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