Al Gore doesn’t think corn ethanol is a good idea. According to this article, his former support was all politics:
Total U.S. ethanol subsidies reached $7.7 billion last year according to the International Energy Industry, which said biofuels worldwide received more subsidies than any other form of renewable energy.
“It is not a good policy to have these massive subsidies for (U.S.) first generation ethanol,” said Gore, speaking at a green energy business conference in Athens sponsored by Marfin Popular Bank. “First generation ethanol I think was a mistake. The energy conversion ratios are at best very small.