Hydrogen Vehicles : Fuel of the Future

The idea was appealing, Ties to foreign oil fields would be severed, and nothing but water vapor would emerge from such a vehicle's exhaust pipe. Congress duly approved the money, and the Department of Energy and other research agencies got to work. But then the whole effort faded into obscurity, as attention shifted first to biofuels and then to battery-powered electric vehicles. Both seemed to offer much quicker and cheaper routes to low-carbon transportation.