FILE - In this July 20, 2013, file photo, an ethanol plant stands next to a cornfield near Nevada, Iowa. Some farm groups and farm-state lawmakers are expressing anger at the Trump administration over final ethanol rules that they say fail to uphold the president's promises to the industry. The Environmental Protection Agency has released final renewable fuel standard rules for next year that do not include language President Donald Trump agreed to that would guarantee 15 billion gallons of ethanol is blended into the nation's gasoline supply. (AP Photo/Charlie Riedel, File)
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