What about biodiesel?

Biofuels boom raises tough questions - Yahoo! News: "NEW YORK - America is drunk on ethanol. Farmers in the Midwest are sending billions of bushels of corn to refineries that turn it into billions of gallons of fuel. Automakers in Detroit have already built millions of cars, trucks and SUVs that can run on it, and are committed to making millions more. In Washington, politicians have approved generous subsidies for companies that make ethanol.


And just this week,
President Bush arranged with Brazil's President Luiz Inacio Lula da Silva for their countries to share ethanol production technology.

Even alternative fuel aficionados are surprised at the nation's sudden enthusiasm for grain alcohol.

'It's coming on dramatically; more rapidly than anyone had expected,' said Nathanael Greene, a senior policy analyst at the Natural Resources Defense Council.

You'd think that would be good news, but it actually worries a lot of people.

The problem is, ethanol really isn't ready for prime time. The only economical way to make ethanol right now is with corn, which means the burgeoning industry is literally eating America's lunch, not to mention its breakfast and dinner. And though ethanol from corn may have some minor benefits with regard to energy independence, most analysts conclude its environmental benefits are questionable at best.

Proponents acknowledge the"