What's the Alternative?

If high prices at the pump have made you more curious about alternative fuels, Popular Mechanics compares a variety of options this month. Given that gas prices may only get worse in the summer, it is an interesting primer for anyone filling up the tank--and anyone concerned about our energy situation.

Which alternative fuels hold the most promise for you? For your company? And, given the talk of oil price manipulation and a "windfall profits" tax, what role must business play in creating a sensible energy policy?