
A French engineer and his son have invented a car that runs on air, no, I kid you not, the car runs on pure air, compressed air. The MDI car is made of light weight composite materials and has under body reservoirs made of light weight carbon fibre containing 200 litres of air each at 4000 psi. This gives the car an autonomy of 150 kilometres with zero pollution. To recharge the air system you can simply plug it in and a mini compressor fills up the tanks in 4 hours or you can "gas up" at a high pressure "air station" in about 3 minutes. Total cost between $2.50 and $5.00.
Man's ingeniousness never ceases to amaze me.
If you are curious here are a couple of links that give information about the technology.
http://www.theaircar.com/ and Discovery Channel's Daily Planet