The MDI AirCar prototype is a toy I want. (Full article at Edmunds.com.)
It runs on compressed air. If you have a renewable source for compressing the air (eg. hydro or wind turbines), it is a truly zero-emission vehicle.
It has a 180cc, two-cylinder engine that runs on compressed air.
You can see the air cylinders underneath the seat.
How awesome would that be for in-town driving? All we have to do is get all the bullshit Hum-Vees off the road so I don’t get killed the first time someone talking on a cell phone while yelling at their kids in the backseat loses track of the red light they’re approaching…