Cancer is neither hereditary nor a
contagious disease. It can be caused by several unknown reasons. Chemical and
physical agents that can cause cancer are called carcinogens.
Examples:
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Soot
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Coal tar (3,4-benzopyrene)
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Cigarette smoke (N-nitrosodimethylene)
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Cadmium oxide
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Aflatoxin
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Mustard gas
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Vinyl chloride
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Diethylstilboestrol (DES)
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Asbestos membrane
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Nickel and Chromium compounds
