I like ethanol, for drinking that is. For an automotive fuel, fermented and distilled from corn or the like, its damn near useless. Oh sure, when the price difference between E-85 and regular gasoline is large enough, I've used it in the past, but that's a stunning example of selling out principled objections for saving $15 or so. I know there are many decent articles already floating around explaining the math, but here's fast simple explanation:
1. Ethanol cannot compete
economically or environmentally with gasoline, especially as straight ethanol has 34% less
energy than gasoline. Sure, you can blend straight ethanol to make E-85, but if you do, you need to
extract all of the water from the
azeotropic ethanol, which is an energy intensive pain. Even then, if gasoline costs, say, $4.00 a gallon, E-85 needs to cost, without
subsidy, ~$3.04 to break even. . More than likely, corn ethanol production is limited in the long term by inevitable price increases in
phosphorus, etc. Oh, the other
problem is that trucks and jet engines won't run on alcohol.
2. The focus on ethanol detracts money, time, and public knowledge away from better alternative energy sources. My personal favorites are oil from algae and
butanol, though there are lots of other candidates. If I had to steer U.S. energy policy, I'd eliminate every incentive for corn ethanol immediately, pump research funding into
algae,
butanol, non-corn ethanol, and battery technology. On top of that, I'd build nuclear power plants as quickly as possible.