Ethanol puts out out more CO2 than gasoline. And it only gives about 2/3 the energy.
Untrue. Ethanol and gasoline, when burned cleanly, put out nearly the same amount of CO2 per energy unit created.
And it takes a lot of energy to make corn based ethanol. I wouldn't be surprised if it takes a gallon of gas to make a gallon of ethanol.
The process of making ethanol from corn that is employed in the U.S. is truly wasteful. But this is only because the headlong rush to get ethanol on the market as quickly as possible (initiated by environmentalists who were scared about global warming) meant that we were making ethanol with technology that wasn't economically feasible and from a product (corn) that isn't economically suitable.
Incidentally, you do understand that it takes a lot of energy to produce a gallon of gasoline and bring it to market, don't you?
The environmental impact of ethanol far out weighs any imagined benefit.
Not when done properly. That's point I've been trying so hard to get across.
Ethanol is an excellent fuel that, when properly produced, burns cleaner than gasoline or any other fossil fuel and is inherently CO2 neutral, unlike all fossil fuels. If reducing our CO2 output is the goal here, then Ethanol is, by far, the best fuel for vehicles. This is not really debatable from a science and technology standpoint.
I repeat: the problem with ethanol is that it's been produced using methods that are horribly inefficient because of the rush to get the product on the market ASAP. If we, as a society, had thought it wise to take more time to come up with a more prudent plan to phase out fossil fuels, we could have developed a process that uses any cheaply available source of cellulose (instead of corn) or plant that can be made into sugar as a source for ethanol and we could have ethanol refineries that operate much more efficiently, as well.
Instead, we used what was already at hand (corn) and refined it using the inefficient technology which existed at the time. Now we're stuck with it because it's been subsidized so much that it's grown too big to simply shove aside and replace it with something better.