Lung Cancer is the leading cause of cancer deaths in the United States, among both men and women, and most of these deaths are preventable. That’s because cigarette smoking is the leading cause of lung cancer. In fact, about 90 percent (that’s 9 out of every 10) of all lung cancers are caused by smoking. A key reason for the link between cigarette smoking and lung cancer is the fact that tobacco smoke contains more than 3,500 chemicals, 40 0f which are cancer-causing, or carcinogens. Cigarettes also contain more than 30 toxic metals such as nickel, cadmium, and radioactive substances.
While lung cancer used to be primarily a disease of men, as more women became smokers, more women developed lung cancer, as compared to men. Smoking is also associated with a number of other tobacco related disease such as emphysema, heart disease, stroke, and certain cancers.