Air Car

I saw this a while ago. It looks like the car runs on compressed air. From Raw Story:

The air car, also known as the Mini-CAT or City Cat, can be refueled in minutes from an air compressor at specially equipped gas stations and can go 200 km on a 1.5 euro fill-up -- roughly 125 miles for $3. The top speed will be almost 70 mph and the cost of the vehicle as low as $7000.

I had saved this YouTube a while ago.

It sounds like they might go into production soon.