The Hummer drew special attention not just because of the sticker in the back window that said, "My Hummer pollutes less than your Prius!" This Hummer was unique because it could run on a mixture of gas and hydrogen. Even Mario Andretti said hydrogen is part of the future when he wished the Hummer's team good luck at the start.
The story said the Hummer's CO2 emissions were dropped 25 to 35 percent in comparison to a gas-only Hummer. The hydrogen was contained in six tanks that were mounted on the roof. Team members say they're developing a high-tech liquid hydrogen storage system.