how does tobacco cause lung cancer The harmful chemicals in smoking 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 Tobacco and Lung Cancer: The
Tobacco and Lung Cancer: The Science behind the Connection CK Birla Hospital Smoking and Lung Cancer Tips to Quit Smoking How Quitting Smoking Lowers Lung Cancer Risk and Other Illnesses How does smoking cause cancer? Cancer Research UK The Science Health Effects of Cigarettes: Cancer Smoking and Tobacco Use CDC
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