Ethanol doesn't have to come from corn

In the U.S., ethanol is almost always mentioned in the same breath as corn. But...is there really enough corn to fuel cars without causing corn export shortages and dramatic spikes in the cost of corn for the dinner table? It's been argued that there's not.Enter Honda. Honda has announced that it may have a breakthrough in ethanol conversion technology. Instead of corn-to-ethanol, Honda proposes