I think that its far to early to rule out ethanol as fuel for internal combustion engines. From what I've read, the main problem with it is the high cost of producing it. However, we all know that with many products production costs have come down as the demand, or the need, for the product has increased and as new technologies have arisen and lowered production costs. I think that this is beginning to happen with ethanol. Corn is not the only source for ethanol. Ethanol can be made from just about anything that either contains sugar or has components that can be changed into sugar. Some non-corn sources out of which ethanol has been made are wild grasses, field grasses, wheat, sugarcane, sugar beets, and the wood pulp by-products of lumber production. Uses are now being found for what's left over of the source of the ethanol after the ethanol has been produced.