Tobacco can damage almost all organs of the human body. 1998 large-scale population survey in China showed that smoking causes 45% of deaths from chronic obstructive pulmonary disease, 15% from lung cancer, and 5%-8% from esophageal cancer, stomach cancer, liver cancer, stroke, coronary heart disease and tuberculosis. If current smoking conditions are not effectively controlled, 100 million Chinese will die from tobacco-related diseases between now and 2050, half of whom will die in middle age (35-60 years), representing a loss of 20-25 years of life. A prospective study of British male physicians followed for 50 years found that smokers died on average about 10 years earlier compared to nonsmokers. Tobacco dependence = drug addiction The essence of tobacco addiction is nicotine dependence, which has all the characteristics of drug addiction. Tobacco dependence is a well-defined neuropsychiatric disorder characterized by an uncontrollable nicotine-seeking urge to use nicotine compulsively and continuously in order to experience the euphoria and pleasure it brings and to avoid possible withdrawal symptoms. Tobacco dependence is a chronic, highly relapsing disease, and treatment needs to be ongoing over time. For Tomorrow, Quit Smoking Whenever you quit smoking, quitters will live longer than continued smokers. The risk of death from coronary heart disease is reduced by about 50% after one year of quitting, and the absolute risk over 15 years is similar to that of never smokers. quitting before age 30 reduces the risk of lung cancer by 90%. The increased risk of oral and esophageal tumors will be reduced by 50% after 5 years of quitting.