I found this today on www.slash.org , It seem the Air powered car is nearing completion. They expect to be producing approx. 3,000 cars a year.
http://www.gizmag.com/go/7000/
These cars run off of compressed air, they cost ~$3.00 US to fill and can go roughly 186 miles on a standard tank. It also requires changing the vegetable oil every 30,000 miles. Also the compressed air is released at a cooler temperature than ambient to it can circulated in to the A/C system. A vary efficient car. Though its top speed is only 68MPH it would be ideal for use within cities where smog is most problematic. It's a pretty neat idea.
http://www.gizmag.com/go/7000/
These cars run off of compressed air, they cost ~$3.00 US to fill and can go roughly 186 miles on a standard tank. It also requires changing the vegetable oil every 30,000 miles. Also the compressed air is released at a cooler temperature than ambient to it can circulated in to the A/C system. A vary efficient car. Though its top speed is only 68MPH it would be ideal for use within cities where smog is most problematic. It's a pretty neat idea.