smoking cigarettes causes lung cancer because 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 What happens to your lungs
What happens to your lungs from smoking? UT MD Anderson A graphic image warning label reading "Cigarettes Cause Lung Cancer" News Photo Getty Images Cancer and Tobacco Use Vital Signs CDC Your Body on Cigarettes: The First Drag to Lung Disease Smoking is the most preventable cause of cancer Eurolab
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