How about a car that runs on air, gets 106 mpg, generates no pollution, and costs $17.8k? It gets 200 miles per tank, and recharges at an air compression station, or plug it in at home and an on-board compresser refills the tank in 4 hours for about $2 of electricity. Too good to be true? Nope. My colleague Marlène gave me a heads up on this zippy looking compressed air vehicle, coming to the US in 2010.