what is the effect of cigarette smoke on lung cancer Health Problems Caused by Secondhand | Smoking and Tobacco Use 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 How does smoking cause cancer? Cancer Research UK Cigarette causes lung cancer What happens to your lungs from smoking? UT MD Anderson Smoking Tobacco Health Effects Lung Cancer Health Risks
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