• The Carlyle Group, which owns the Philadelphia Energy Solutions oil refinery, above, and its allies helped convince policymakers that the rising mandates would cripple their businesses and threaten thousands of jobs. David Parrott / Reuters
    The Carlyle Group, which owns the Philadelphia Energy Solutions oil refinery, above, and its allies helped convince policymakers that the rising mandates would cripple their businesses and threaten thousands of jobs. David Parrott / Reuters
  • A crude oil train is parked outside the Philadelphia Energy Solutions refinery owned by The Carlyle Group. David Parrott / Reuters
    A crude oil train is parked outside the Philadelphia Energy Solutions refinery owned by The Carlyle Group. David Parrott / Reuters
  • A truck driver unloads his cargo of corn into a chute at the Lincolnway Energy ethanol manufacturing plant where it will be converted into fuel for vehicles. Jason Reed / Reuters
    A truck driver unloads his cargo of corn into a chute at the Lincolnway Energy ethanol manufacturing plant where it will be converted into fuel for vehicles. Jason Reed / Reuters
  • Alan Kroska refuels his ATV with 'Real Gas, No Ethanol' at the Freedom Market in Freedom, New Hampshire in this 2011 photo. The owner of the Freedom Market, explains that he gets ethanol-free gasoline from Canada because it is not manufactured or available in the United States. Brian Snyder / Reuters
    Alan Kroska refuels his ATV with 'Real Gas, No Ethanol' at the Freedom Market in Freedom, New Hampshire in this 2011 photo. The owner of the Freedom Market, explains that he gets ethanol-free gasoline from Canada because it is not manufactured or available in the United States. Brian Snyder / Reuters
  • A crude oil train is parked outside the Philadelphia Energy Solutions refinery owned by the Carlyle Group. David Parrott / Reuters
    A crude oil train is parked outside the Philadelphia Energy Solutions refinery owned by the Carlyle Group. David Parrott / Reuters
  • An employee walks among pipes and machinery that convert corn into ethanol inside the Lincolnway Energy plant in Nevada, Iowa. Jason Reed / Reuters
    An employee walks among pipes and machinery that convert corn into ethanol inside the Lincolnway Energy plant in Nevada, Iowa. Jason Reed / Reuters
  • A worker closes the hatch after filling a railroad tank car with ethanol fuel, converted from corn, at the Lincolnway Energy plant in the town of Nevada, Iowa. Jason Reed / Reuters
    A worker closes the hatch after filling a railroad tank car with ethanol fuel, converted from corn, at the Lincolnway Energy plant in the town of Nevada, Iowa. Jason Reed / Reuters
  • An attendant pumps gasoline blended with 10 per cent ethanol at the UPI Energy gas station in Chatham, Ontario. Mark Blinch / Reuters
    An attendant pumps gasoline blended with 10 per cent ethanol at the UPI Energy gas station in Chatham, Ontario. Mark Blinch / Reuters
  • United Steelworkers Local 10-1 president Jim Savage addresses workers from the Philadelphia Energy Solutions refinery owned by the Carlyle Group. Carlyle Group and other oil refiners helped convince policymakers that the rising mandates would cripple their businesses and threaten thousands of jobs. David Parrott / Reuters
    United Steelworkers Local 10-1 president Jim Savage addresses workers from the Philadelphia Energy Solutions refinery owned by the Carlyle Group. Carlyle Group and other oil refiners helped convince policymakers that the rising mandates would cripple their businesses and threaten thousands of jobs. David Parrott / Reuters

In pictures: America’s Big Oil versus Big Corn


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The clash heats up between America’s ‘Big Oil’ and ‘Big Corn’, two powerful and deep-pocketed lobbies, on who should bear the cost of blending increasing volumes of biofuels like ethanol into fuel supplies under a 2007 US law.