Throughout most of this century, the American's private automobile has been a vehicle of personal freedom, of both convenience and romance. Now the whole era of the open road may be ending—or at least fading—because of a document entitled the Clean Air Amendments of 1970.
By this act, in the name of public health, Congress has set strict federal limits on key air pollutants across the nation. During a period that started last week and will continue until a Feb. 15 deadline, every state must report how it plans to obey the federal standards...
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