Tata Motors, India's largest automaker, will soon start producing the world's first commercial air-powered vehicle. The Air Car uses compressed air, as opposed to the gas-and-oxygen explosions of internal-combustion models, to push the engine's pistons, or simply: to make the car go.

Approximately 6,000 zero-emissions Air Cars will hit Indian streets in the next few months. The Air Car, known as the "MiniCAT," will cost around $8,177.00 and will have a range of around 185 miles between "refueling." The cost of a refill will be about $2.

Keys are not part of the accessories offered to a buyer, but instead, an access card that can be "read" by the car's computer from the driver's pocket. According to designers, MiniCAT costs less than $1.11 per 62 miles to drive, which is about one tenth lower than the cost of driving a gasoline-powered car, and has a top speed of 65 miles per hour.

Not bad for a lot of hot air.