why is cigarettes addictive Most tobacco products, including e-cigarettes, contain nicotine, a chemical that can harm the heart, brain and whole body. As with other products, using a nicotine product builds tolerance, leading to more Modern Addiction: Hooking the Next
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Many physicians still doubted that there was a widespread connection between smoking and disease
T-Shirt Vintage Cigarette Advertising 19 Camel, 1941
Most of the harm is due to the inhalation of combustion products (about 70 human carcinogens, other toxins, and carbon monoxide) (105)
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