Ambient air pollution and lung cancer incidence in 1965--1975 among native population of an industrial city.

Lung cancer incidence in Zabrze (Upper Silesian Region, Poland) in the years 1965--1975 among native population was analyzed in connection with industrialization level and air pollution. In comparison with other towns or rural counties of Poland, the native population of the industrial city Zabrze is characterized by a lower risk of lung cancer in spite of the fact that the native population of the city has been exposed for a long time to different harmful chemical impurities of air.