Have you ever come across David Blume's Book "Alcohol can be a gas' ??? I got to hear his lecture at a Festival in Hopland CA some years ago... The thing he said that always stayed with me was: "The United States demand for fuel can be met by grass clippings'" meaning cellulosic ethanol could be used to make all the ethanol the US needs for transport. Amazing. Great Post, look forward to the next one!