From our friends at the Wheels blog:

There’s no question that people love the idea of compressed-air cars, which have long been under development by the French company Motor Development International and, according to a company spokesman, could be on American roads (after many delays) by 2012.

“It sounds ideal, like we could be free from the constraints of petroleum dependence,” said Andrew Papson, a transportation engineer and associate at the consulting firm ICF International.

But as much as the idea is attractive, Mr. Papson is skeptical about air cars. He finished graduate studies at the University of California, Berkeley, last year and was part of a team at the school that published a paper this week that was critical of air-car claims.

The “Economic and Environmental Evaluation of Compressed-Air Cars,” published in Environmental Research Letters, examined the life cycle of the compressed-air car and concluded that the air car “fared worse than the battery-electric vehicle in primary energy required, greenhouse gas emissions and life-cycle costs, even under very optimistic assumptions about performance. Compressed-air-energy storage is a relatively inefficient technology at the scale of individual cars and would add additional greenhouse gas emissions with the current electricity mix.”

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