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 Key Stage 3 Science: Student
Key Stage 3 Science: Student Book 1 by Collins Issuu How smoking puts tar into your lungs and damages them How Smoking and Nicotine Damage Your Body FV Hospital Understanding the Health Dangers of Tar and Nicotine Tobacco carcinogens, their biomarkers and tobacco induced cancer Nature Reviews Cancer
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