You're not going to save the world this way. People are doing it at their discretion.

We found unequivocally that it does not take more energy than you get out of the amount of ethanol. So it's a net good if you grow ethanol and use it.

The assumptions made by some of the authors were not based on the best data, or were just a little bit too convenient, and had a strong impact on the results.

Converting to fuel ethanol will not require a big change in the economy. We are already ethanol-ready. If ethanol were available on the supply side, the demand is there.

The people who are saying ethanol is bad are just plain wrong. But it isn't a huge victory -- you wouldn't go out and rebuild our economy around corn-based ethanol.

This is the tragedy of the commons because there is no clear winner.