Cigarette smoking

Cigarette smoke contains over 4,700 chemical compounds including 60 known carcinogens. There is conclusive evidence to indicate that long-term smoking greatly increases the likelihood of developing numerous fatal conditions.
Cigarette smoking is responsible for more than 85% of lung cancers and is also associated with cancers of the mouth, pharynx, larynx, esophagus, stomach, pancreas, uterine cervix, kidney, ureter, bladder and colon. Cigarette smoking has also been linked to Leukemia. Apart from the carcinogenic aspects of cigarette smoking, links to increased risks of cardiovascular diseases (including stroke), sudden death, cardiac arrest, peripheral vascular disease and aortic aneurysm have also been established. Many components of cigarette smoke have also been characterized as Ciliotoxic materials that irritate the lining of the respiratory system resulting in increased bronchial mucus secretion and chronic decreases in pulmonary and mucociliary function.
Cigarette smoke appears to be one the main, preventable causes of disease in the modern world and it seems likely that conventional cigarette smoking will become increasingly restricted as public awareness of the effects of passive smoking increases and other dangers of smoking become more apparent. Environmental Tobacco Smoke exposure presents a definite health risk; particularly to young infants it is the responsibility of smokers to ensure that they do not provide unnecessary health hazards to non-smokers. It has so far been impossible to define a threshold level below which a passive smoker or direct cigarette smoker exposure can be deemed safe and free from risks since it the whole concept of whether a carcinogen can possibly have a safe threshold level is currently under debate.

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