Contribution of Polycyclic Aromatic Hydrocarbons and Other Polycyclic Aromatic Compounds to the Carcinogenicity of Combustion Source and Air Pollution
From epidemiological studies, it is obvious that various cancer diseases are caused by exogenous factors. However, the existence of these factors has been proven only for a few types of cancers. For example, a definite correlation is well established between smoking habits and formation of malignant tumors of the respiratory tract. The Department of Epidemiology and Statistics of the American Cancer Society has calculated from the epidemiological studies so far that 82.7% of the male lung cancer cases in the United States can be attributed to cigarette smoking. Accordingly, only 17% of lung cancers remain, possibly caused by occupational impact, which may be correlated to ubiquitously occurring environmental carcinogens or which cannot be attributed to any factors. However, only 35% of the cancer mortality can be attributed to smoking, if all kinds of cancers occurring in males in the U.S. are regarded.
KeywordsPolycyclic Aromatic Hydrocarbon Diesel Exhaust Diesel Exhaust Particle Carcinogenic Potential Polycyclic Aromatic Compound
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