At the Detroit Metro airport today, Ford - along with U.S. Congressman John Dingell - are announcing the delivery of two of Ford's hydrogen-powered H2ICE buses. The special E-450 shuttles burn hydrogen in an internal combustion engine and are already in use in places like Parliament Hill in Ottawa, Canada. Ford has built 30 H2ICE buses and 23 have now been delivered. Ford claims these shuttles offer CO2 emissions reduction of 99.7 percent (compared to a gasoline-fueled E-450, I'm guessing).