Alt.Fuels

As part of its 'Quest for Alternative Energy Sources,' the Christian Science Monitor runs down the contenders vying to replace gasoline as the primary fuel for transportation. As the paper notes, "The successful fuel not only has to be cheaper than gasoline, it has to be produced in huge quantities and survive future swings in gas prices. There's another potential hurdle: Environmentalists want alternatives with smaller greenhouse-gas emissions than gasoline." Yes indeed.