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The idea behind cellulosic ethanol assumes that modern agiculture produces waste cellulose. But it doesn't. That cellulose is normally plowed back into the soil to provide organic nutrients. Without it, crop yields are much lower. If we start burning that cellulose in SUVs and feeling happy because we've saved the world, we've ended up in a deeper hole than before. The only solution to greenhouse warming is living with less energy, in ways that make our neighbors look askance. Get used to it; the future is full of unmowed lawns and people riding to work on mopeds.
