[gotribe]

The problem with ethanol is that it is an unconcentrated form of energy, i.e. it takes too much feedstock to create a unit of energy compared to oil, nuke, etc. Efficiency and economics favors using the most concentrated forms of energy. Nuclear and hydrogen are better bets than ethanol in the long-run.

[SauronOfMordor]

Ethanol has 6,100 Wh/l, gasoline is 9,700 Wh/l, over 50% more energy/gal. energy density of various fuels