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Smoking is the most preventable cause of cancer Eurolab Health Effects of Cigarettes: Cancer Smoking and Tobacco Use CDC Winter Lung Cancer Causes: Indoor Air Pollution and 7 Other Dangerous Risk Factors of Lung Cancer 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 Quitting Smoking Lowers Lung Cancer Risk and Other Illnesses Smoking is the major cause of COPD and lung cancer. Oxidants in Download Scientific Diagram

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