Berkeley Professor on inefficiency of ethanol

Ted Patzek, a Berkeley Professor (yes, Berkeley), claims that ethanol requires 6 times more energy to create than it produces. If you look at the various formulations out there that attempt to figure out the energy to produce-energy provided ratio of ethanol, you learn pretty quickly that the variables that are/aren't chosen are highly subjective. This graphic is a very interesting look at Patzek's take on the issue, though.