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Hyundai Greenspeed Gator
The Greenspeed Gator from Hyundai was inspired by drag racers of the 1960s and the fuel cell innovations of the 21st century. Under the hood are hydrogen storage tanks, and the rear wheels house electric motors.
Environmental consciousness hits the raceways in the Kia Sidewinder design. Kia's entry in the design challenge incorporates a compressed natural gas turbine, which feeds electricity to high-torque in-wheel electric motors.
Mercedes Mojave Runner
A gasoline-electric hybrid from Mercedes, the Mojave Runner features night vision, sandstorm radar and GPS sensors. It also comes with smart tires--they automatically change tread depth to match the road (or off-road) conditions.