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 How Quitting Smoking Lowers Lung
How Quitting Smoking Lowers Lung Cancer Risk and Other Illnesses How does smoking cause cancer? Cancer Research UK Cancer and Tobacco Use The Science Smoking is the number one cause of lung cancer. It causes about 90% of lung cancer cases. Tobacco smoke contains many chemicals that are known to cause lung cancer. If you still Lung Cancer Risks Preventive Primary Care
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