This compressed air powered car is a cool innovation from India. You can fill the tank at filling stations with special compressed air pumps for about $2 or fill it with a home air compressor in about four hours. It doesn't say how much that is, but it sounds comparable to an electric car which is very, very cheap.

How cheap? At $2 to fill up and a 125 mile range, it would cost about $0.016 per mile in fuel. A Toyota Prius feels like a fuel hog - at $4 per gallon and 50mpg, it would cost $ 0.08 per mile in fuel.

And if you didn't guess already, compressed air is, well, compressed air and so there is no tailpipe and no emissions. Cost in India is about $12,700.

Unfortunately this car is made of extremely lightweight materials that would not be durable in crashes and so it's unlikely to be legal in the US.

At least not yet.

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