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Health effects of smoking tobacco Wikipedia How does your body digest a cigarette? HowStuffWorks Tobacco's harm doesn't stop at the lungs. When tobacco smoke or chewing products enter the body, cancer causing chemicals travel far beyond where they're inhaled or held. These carcinogens are absorbed into the The Difference Between Healthy Lungs and Smoker's Lungs Exposed to Tobacco Circulating Now from the NLM Historical Collections Marijuana in the Body How Marijuana Works HowStuffWorks
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