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Parental smoking exposure and adolescent smoking trajectories
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All size distribution measurements confirm a lognormal frequency characteristic of aerosols having undergone coagulation by Brownian motion 38
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On the other handthe increase of certified respiratory cancer mortality during the past 20 years has been as rapid in country districts as in the cities with the best diagnostic facilities, a fact which does not support the view that such increase merely reflects improved diagnosis of cases previously certified as bronchitis or other respiratory affections Two main causes have from time to time been put forward: (1) a general atmospheric pollution from the exhaust fumes of cars, from the surface dust of tarred roads, and from gas-works, industrial plants, and coal fires
