In the paper, the authors compared the dynamics of the carcinogenic benzo(a)pyrene content in the atmospheric air of the Irkutsk Region cities and the cancer morbidity of the population. Further, the authors estimated benzo(a)pyrene emissions from “low” power heat sources (boiler houses and household furnaces). Dependences of the content of benzo(a)pyrene in the atmosphere of cities on its gross emissions by “small” heat sources, on the area of forest fires are found. The study showed their impact, as well as the impact of motor transport and forest fires on the state of the atmosphere of industrial and agricultural cities of the region. The authors drew a conclusion about the contribution of man-made and natural sources to the atmospheric pollution with benzo(a)pyrene, and about the need to define it and develop measures to reduce emissions.
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