In Dave Blume's Alcohol Can Be A Gas he rebuts the claim that ethanol is energy negative and shows how a profitable ethanol station could run. Food Vs. fuel is just a distraction there was a surplus of grain last year and the grain fed to cattle could be fermented first then the cows fed the dried distiller's solids which are better for the cow anyway. For the number of footnotes in Bryce's book it sure is poorly researched.