There is more optimism today on the opportunities for non-food biofuel crops with a number of bloggers outlining the possibilities of non-food crops. Today we have Bobmorris' Politicis in the zeros' blog promising us non-food fuels in the next 15 years. To me though that's quite a long gap, we'll need to do something in the mean time. Perhaps we could use the organic parts of waste to produce biofuels.