Wind powered car This design may look old-school, but in place of a traditional car engine, this vehicle would catch the wind through its grill and generate electricity via a wind turbine. The faster this car goes, the more wind it could catch. The generator would be high speed (RPM) and low torque (compared to a steam turbine or jet turbine), so the turbine and shaft would be much lighter and thinner. It would look like a normal car with a big grill. It would also have big side vents and a bottom vent to enable good air flow.

Photograph: John Adams/GuardianWitness