does tar in cigarettes cause cancer The 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 What chemicals are in a
What chemicals are in a cigarette? What does smoking do to your body? Cancer Research UK How a two faced media covered cancer: Promoting researchand cigarettes The Cancer History Project How smoking puts tar into your lungs and damages them Tobacco and Cancer Cancer CDC How does smoking cause cancer? Cancer Research UK Smoking and cancer Fresh
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