Running On Air

Jessica Marshall reports for Discovery News on compressed air innovations in Asia and America. Widespread use of compression engines would reduce smog and air pollution levels, but its environmental impact would hinge on the compression's energy source. Researchers at the University of Taiwan have developed a protoype scooter engine running completely on air. The two and a half gallon engine can go three quarters of a mile, a limitation Zero Pollution Motors boats it can exceed. Planning to start on the car's plant in 2010, the American company's car runs just on air for speeds below 35 mpg. Faster, and petrol is burned to heat the air, increase the speed, and recharge the tank.

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