The International Automobile Show, it is called, but it might also be known as the International Smog Machine Show. It is well known, of course, that the gasoline-powered car is the major polluter of U.S. air—a problem for which neither Washington nor Detroit has yet managed to find a solid solution. Short of reverting to the horse and buggy, the obvious answer is to develop a new propulsion system for automobiles that is as efficient as but less noxious than the internal-combustion engine. When the annual auto show opened in Manhattan last...
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