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The main cause of lung cancer is cigarette smoking. Eighty-five to ninety percent of all lung cancer cases can be attributed to cigarette smoking. Even people exposed to second-hand tobacco smoke have an increased risk of developing lung cancer. Several other risk factors include exposure to radon, asbestos, and certain air pollutants. Lung diseases such as tuberculosis (TB) also increase a person's risk of developing lung cancer.
The best way to prevent lung cancer is to stop smoking. Eighty-five percent of lung cancer cases could be prevented if people stopped or never started smoking. Quitting smoking is beneficial at any age. If you're a non-smoker, stay away from tobacco smoke and strive for a smoke-free environment at home and at work.
» A former smoker staves off lung cancer
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