Take the Richmond station, which generates hydrogen fuel by electrolysis, a process that separates water into hydrogen and oxygen. Using technology from Canada-based Stuart Energy, the separation process is powered by electricity. The catch: The electricity comes off the grid. "You can connect to the grid, or you can connect to renewable sources like wind and solar," says Wanda Cutler, a spokeswoman for Stuart Energy. "The grid is very clean, and you don't necessarily have to make your hydrogen during peak periods." The grid is very clean? In the United States more than 50 percent of power plants are coal-fired, while renewable sources, like wind, account for less than 2 percent of electrical energy, according to the Union of Concerned Scientists. "If you take the electricity from the current energy mix in the U.S., then in fact it doubles the CO2 [produced] per mile," says John Turner, a principal scientist at the National Renewable Energy Laboratory in Golden, Colo. Wow. I knew that there had to be some kind of catch to Dubya's endorsement of Hydrogen Fuel-Cell vehicles, but I figured it was along the lines of ADM producing lots of genetically engineered corn to create ethanol. The idea that it will be produced through electrolysis is much worse, since he also rolled back the requirement that power plant add-ons are exempt from clean air laws. Not-so-clean cars | 
