Trouble is that alcohol blended gasoline isn't energy efficient--it takes more energy to make a gallon of alcohol than you can get from burning it. That energy, in the form of electricity or natural gas, comes from traditional sources. The more energy consumed making alcohol the less less electricity and natural gas is available for other things like heating homes all this with no net gain of energy from burning the alcohol produced as a gasoline blend.
I'm convinced that all the windmill electric generators being built around the country are a similar waste of money.