Wow, this post has interesting information. Patzek is a guy who used to work for Shell, and co-authored studies with David Pimentel, a Cornell professor who wrote all those studies one always hears about showing that it takes more energy to make ethanol than you derive from it.

Thing about Pimentel? He's a flippin' entomologist. He knows jack about what he purports to be an expert in. The USDA, DOE, and basically everyone else who's ever looked at his studies except Patzek have all concluded creating ethanol creates energy.

This is a fascinating piece of information.