So if government subsidies help farmers buy gasoline to convert cornhusks into ethanol then maybe I won't be using as much gasoline, but the economy as a whole will.
Everything you've read that says that is funded by the oil industry, and is disingenuous at best. They assign the total energy cost of the processing of the corn to only ONE of the products of the process - the ethanol. They totally disregard the other products that result from the production of ethanol. And why is not taxing something always called a subsidy???