An interesting followup from George Monbiot on the problems associated with producing biofuel, particularly in Britain. I wasn't aware that corn was a big up and coming biofuel crop in Britain and according to Monbiot not a good choice. Generally I get the idea that in Monbiot's world biogas conversion should come from waste, not original food sources, that is if feeding folks is something to be valued.
It is definitely wrong to convert food crop land to fuel. The population is too concentrated in the world as a whole. It is the wastes which should be converted to fuel, or rather used as carbon feed to carry solar and nuclear energy. Wildfires and stinking landfills prove that there is a lot to do in this direction. The energy for desalination and pumping of water for afforestation of waste lands should also be nuclear. It may be useful to develop and grow salt water crops too.