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Honda's Running Bus
One of Honda's entries in the Design Challenge, the Running Bus, offers a different take on hybrid energy--inspired by California's fitness culture, it packs 10 stationary runners inside the bus for power.
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.