FILE - In this July 10, 2012 file photo, Suzanne Meredith, of 

FILE - In this July 10, 2012 file photo, Suzanne Meredith, of Walpole, Mass., gases up her car at a Gulf station in Brookline, Mass. Reducing sulfur in gasoline and tightening emissions standards on cars beginning in 2017, as the Obama administration is proposing, would come with costs as well as rewards. (AP Photo/Steven Senne, File)
Associated Press
FILE - In this July 10, 2012 file photo, Suzanne Meredith, of Walpole, Mass., gases up her car at a Gulf station in Brookline, Mass. Reducing sulfur in gasoline and tightening emissions standards on cars beginning in 2017, as the Obama administration is proposing, would come with costs as well as rewards. (AP Photo/Steven Senne, File)
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