how does 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 Cigarette Smoking Is the Main Cause of Lung Cancer HealthXchange Pictures Better Than Words For Scaring Smokers off Cigarettes Smoking is the number one cause of lung cancer. It causes about 90% of lung cancer cases. Tobacco smoke contains many chemicals that are known to cause lung cancer. If you still
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