does the tar in cigarettes cause cancer harmful chemicals smoking directly damage lung cells, causing DNA mutations that increase risk. Over time, these damaged cells grow abnormally, leading to tumor formation in the lungs. Quitting smoking How does smoking cause cancer?
How does smoking cause cancer? Cancer Research UK Cancer and Tobacco Use Vital Signs CDC Carbon monoxide & tar PPTX Cigarettes release toxic chemicals like carbon monoxide and lead What is Tar from Smoking?
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