FILE PHOTO: Logistics supervisor Travis Harrison walks among pipes and machinery that convert corn into ethanol inside the Lincolnway Energy plant in the town of Nevada, Iowa, December 6, 2007. REUTERS/Jason Reed (UNITED STATES)/File Photo
FILE PHOTO: Logistics supervisor Travis Harrison walks among pipes and machinery that convert corn into ethanol inside the Lincolnway Energy plant in the town of Nevada, Iowa, December 6, 2007. REUTERS/Jason Reed (UNITED STATES)/File Photo