Dozens of companies seem to be rushing to develop and prove the feasibility of fuel cells in applications ranging from power for your vehicle to basic home energy plants, and in larger applications, for community or regional power-generating stations.
Fuel cells have been used in the U.S. space program since 1965. They convert hydrogen and oxygen into direct current (dc) electricity, heat, and water. The electricity production works in reverse of a popular high school science demonstration, in which battery power separates hydrogen from oxygen contained in water.