The 13.9 billion gallons (52.5 billion L) of ethanol added to the U.S. fuel supply last year reduced the price of gasoline by $1.09 a gallon, researchers at the University of Wisconsin and Iowa State University say. The Center of Agricultural and Rural Development at Iowa State says regular gasoline averaged $3.52 a gallon in 2011 and without the ethanol, the price would have been about $4.61. A new report from the center says the average American household used 1,124 gallons (4,248 L) ...

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