lung cancer caused by cigarettes What You Need to Know About Smoking and 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 The Unbreakable Link: Tobacco and Lung Cancer How Do Cigarettes Cause Cancer? Memorial Sloan Kettering Cancer Center Stopping smoking could halt further damage to lungs CRUK CC
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