Compressed air-powered cars are not as far-fetched as they seem as they are considered zero emissions vehicles that are coming to market as soon as this August.
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Compressed Air Powered Cars

Morgan LifeCar Hydrogen Fuel Cell Vehicle to Debut
The British hand-built Morgan LifeCar hydrogen fuel cell vehicle will debut at the 2008 Geneva Auto show and offers speed and zero emissions.

Solar-Powered Interstate Traveler Hydrogen Super Railway
The Interstate Traveler is developing a solar and hydrogen powered MagLev light rail transportation system that will use zero emissions.

Dodge ZEO All-Electric Concept Car Unwrapped
The Dodge ZEO, all electric, zero emissions concept vehicle has been unveiled at the 2008 Detroit Auto Show and has a range of 250 miles.

Suzuki Crosscage
The Suzuki Crosscage is a zero emissions hydrogen fuel cell motorcycle just unveiled at the Tokyo Motor Show.

Canadians and Brits Set Sail on Hydrogen Boats
The Canadian and British this week have both set sail on separate hydrogen fuel cell boats, promotion clean energy and zero emissions.

Hydrogen Go-Kart Breaks Land Speed Record
A hydrogen fuel cell go-kart has broken the world land-speed record while giving off zero emissions.