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Lung cancer occurs when the cells within the lung tissue are altered at a genetic level to mutate and multiply at an aggressive rate. The results of many studies on the effects of tobacco have shown that cigarette smoke carries numerous chemicals, called âmutagensâ, that cause lung tissue cells to mutate. Substances such as carbon monoxide, hydrogen peroxide and benzopyrene contained in cigarette smoke affect how cells change and grow.
Tobacco as a cause of lung cancer Over the last sixty years, doctors, scientists and clinical researchers have established what many observers have long felt was the case: a causal link exists between smoking cigarettes and the incidence of lung cancer.