Don’t forget, it takes more input energy than the fuel output from ethanol , so it is good for the economy, and diesel does not use ethanol, so it is of no consequence to the oil supply side ( diesel). But, of course, corn as ethanol is not as important as corn for food ( corn sucks as a food source) so keeping the farmers land under the plow is more important than anything else- its not as if that land cannot be used for a viable food stock, like wheat, of course, but then wheat farmers subsidies would have to go up, as supply reduces prices.... Hmm...
Seems the world got convoluted on this equation huh?
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Wait a few more years of declining harvests and again evaluate the worth of livestock feed versus alcohol production.