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.

It is not a massive savings, not like putting in 10 percent energy and getting out 100 percent. We find it is somewhat better than gasoline, but it's not a home run.

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

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.

It looks to be that you can get just about twice the amount of energy by going the cellulose route, and greenhouse emissions are very small.