By far, most lung cancers are caused by smoking tobacco. The risk of lung cancer begins to slowly decrease as soon as a person quits smoking. Each year, thousands of lives could be saved if people did not smoke. Although smoking is without question the major cause of the lung cancer epidemic, there are some others.
Passive smoking is one.
Exposure to other carcinogens, such as asbestos, is another. Tuberculosis can increase the risk. Recent studies have shown that genetic factors may also have a role in determining lung cancer risk. If you do smoke, quitting early in life is best, but it is never to late to kick the habit and reduce your risk. Follow safety rules and procedures to reduce exposure to carcinogens in the workplace.