What is cellulosic ethanol and how does it fit with green cars?
I guess the whole idea behind going to cellulose to ethanol is that parts of a plant or grass or wood can be used and therefore not compete with the food crop. For example instead of using corn they could use the rest of the corn plant or the husk after the corn has been removed for food. That is this sort of ethanol can be made from crop waste and not the food part of the plant. Trouble is so far i dont know if it is efficient enought to be profitable, but looks like Bp has solved this problem.