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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.
The main health risks of using tobacco are linked to diseases of the cardiovascular system and respiratory system. Cardiovascular diseases caused by smoking include heart disease and stroke. Diseases of the respiratory system that are caused by exposure to tobacco smoke include: 1  Emphysema.2  Lung cancer. 3  Cancers of the larynx and mouth.he main health risks of using tobacco are linked to diseases of the cardiovascular system and respiratory system. Cardiovascular diseases caused by smoking include heart disease and stroke. Diseases of the respiratory system that are caused by exposure to tobacco smoke include: 1  Emphysema.