how cigarette smoking causes lung cancer The harmful chemicals in directly damage cells, causing DNA mutations that increase risk. Over time, these damaged cells grow abnormally, leading to tumor formation in the lungs. Quitting smoking Untitled Document

Untitled Document According to the American Cancer Society (ACS), smoking is the leading cause of lung canceraccounting for about 80% of lung cancer deaths in the U.S. Exposure to secondhand smoke, radon, and certain Lung Cancer Treatment & Smoking Effects American Oncology Smoking A Pack Of Cigarettes A Day Causes 150 Mutations A Year In Every Lung Cell IFLScience Campaign Smoking causes most lung cancer deaths. Today, for #WorldLungCancerDay, let's commit to ending the death and disease caused by tobacco. Facebook

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