For the record, I just found a reference that states that ~40% of corn grown in the US gets turned into ethanol. 40%. We consume somewhere between a half a gallon and a full gallon of petroleum (between fuel for the machines, production of chemicals, etc.) for every gallon of ethanol we get out of the process. There is no justification for this other than make-work for farmers, chemical companies and the whole ethanol-industrial complex.