can smoking cigarettes cause lung cancer The harmful chemicals in smoking
The harmful chemicals in smoking directly damage lung cells, causing DNA mutations that increase cancer risk. Over time, these damaged cells grow abnormally, leading to tumor formation in the lungs. Quitting smoking Most smokers don't think in terms of "pack years.", They think:, "I only smoke a few.", "I've cut down.", "I don't smoke as much as before.", But cancer risk doesn't only look at today's cigarette., Cigarette causes lung cancer HealthMatch Smoking and Lung Cancer: How Big is the Problem Today? Cigarette Smoking Is the Main Cause of Lung Cancer HealthXchange
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