Tobacco contains many carcinogens, in addition, there are many carcinogens and ciliated toxins that can reduce the body's ability to expel foreign bodies. These poisons attach to the tiny particles of cigarette smoke, reach the alveoli, and deposit there, strengthening each other. As a result, the carcinogenic effect is greatly enhanced. People who smoke more than 10 cigarettes a day have a lung cancer mortality rate 2.5 times that of non-smokers. In addition, smoking can also cause laryngeal cancer, oral cancer, nasopharyngeal cancer, esophageal cancer, pancreatic cancer, bladder cancer and so on.
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