That is an incorrect statement. People are researching this as we speak and have been for the last couple of years at least. I think it is called cellulosic ethanol or something like that, but it utilizes switch grass. They know the starting point and they know the end point, but finding a way to do it while using less energy and other chemicals has been the problem.
wiki
I know we are looking into switch, but why would the farmers give up corn? Ethanol has turned into the feel good Big Business and nobody will take on the farmers....at least not that I can see. In an ideal world we'd be running algea.
Snowfox, the book doesn't flat out talk about farming in that regard. Just how in some areas you are paid not to grow a crop, yet 3 states over you can grow it with government water and get other aid as well.