Medicine: Something in the Air

It was all very well to show that there is something in cigarette smoke that can cause lung cancer, but the proof of this (TIME, Nov. 30) still left a further question unanswered. Why do city dwellers seem to get more lung cancer than folk down on the farm with the same smoking or nonsmoking) habits? Could it be something in the air?

The answer is yes, say four University of Southern California researchers, headed by Dr. Paul Kotin, in the Archives of industrial Hygiene and Occupational Medicine. From samples of Los Angeles air (collected on both smoggy and clear days), the...

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