Tobacco use has been described by the World Health Organization (WHO) as the “fifth threat” to mankind (the first four being war, famine, pestilence and pollution). Tobacco is the second leading cause of human death. About half of all smokers will eventually die from diseases caused by smoking, and one-half of them are middle-aged people.WHO estimates that the number of deaths caused by smoking in the world currently reaches 3 million per year, and it is expected that the number will increase to 10 million by 2025, of which 7 million deaths will be in developing countries. Smoking seriously pollutes the environment and makes the non-smokers (children, women) around us passive smokers.WHO points out that thousands more non-smokers die every year because of passive smoking. If we do not take immediate and decisive measures, the tobacco problem will claim one billion lives in the 21st century. China is the world’s largest producer and largest consumer of tobacco. Both production and consumption account for more than 1/3 of the world. At present, there are about 350 million smokers in the country, accounting for 1/3 of the world’s smoking population, and the rate of increase is 2% per year. At present, more than 2,000 people die from smoking every day, which is more than the total number of deaths from AIDS, tuberculosis, traffic accidents and suicides, accounting for 12% of all deaths, and it is expected to increase to 8,000 people/day by 2050 if no control measures are taken, half of whom are 35 ~ 64 years old at the time of their deaths. Medical confirmation, each cigarette burning released more than 4000 kinds of chemical substances, billions of particles, which contains nicotine, carbon monoxide, tar, ammonia, benzene and other 69 kinds of carcinogens. These harmful substances inhaled into the human body, adhering to the walls of the airways and alveoli, easy to lead to bronchitis, emphysema and even lung cancer; and carbon monoxide can make the oxygen content in the blood significantly reduced, resulting in hypertension, heart disease and other cardiovascular diseases; nicotine to make the brain nerve dependence, so that smokers are depressed, sexual function decline. Anatomy confirms that smokers with more than ten years of smoking experience have obviously black lungs! Some statistics estimate that every cigarette smoked shortens life by 5 minutes. Polish and American surveys have proved that smokers have an average life expectancy of 8 years shorter than non-smokers. Medical doctors have done such an experiment: more than 10 years of smoking age smokers, continuous smoking 20 cigarettes, the experimenter felt chest tightness, headache, limb weakness; continuous smoking 60 cigarettes, the experimenter breathing difficulties, into a coma state of poisoning! The World Health Organization found that: the age of smokers more than ten years, more than 20 cigarettes a day smokers, has been in a state of deep smoking poisoning: sore throat, chest pain and chest tightness, coughing, nausea, bad breath … Smoking and respiratory diseases are closely related to the first contact with cigarette smoke is the mucous membranes of the respiratory tract, the dry and hot smoke can cause irritation of coughing, and at the same time make these mucous membranes These mucous membranes become very dry and chronically congested. In order to make the mucous membrane of the respiratory tract to continue to maintain moist, mucous membrane cells compensatory secretion of excessive mucus, these excessive mucus out of the body, is the usual phlegm, long-term smokers generally have a chronic cough, phlegm. In addition, the soot particles in the smoke is 50,000 times more than the particles in the air, and the soot particles contain many harmful substances, they can make the cilia poisoned, damaged, can make the mucus secreted coagulation, so that the cilia and mucus to lose the function of resistance and protection. Thus, a large number of poisons as well as bacteria can take advantage of the opportunity to enter and stagnate in the bronchial tubes and alveoli, which may cause inflammation of the respiratory tract. Long-term heavy smoking can cause chronic bronchitis and even lead to emphysema. Smokers suffer from chronic bronchitis, emphysema is more, is 4 ~ 25 times that of non-smokers, and with the amount of smoking and smoking age is proportional. Also smokers often suffer from chronic pharyngitis and vocal cord inflammation. Among respiratory diseases, the most closely related to smoking are chronic obstructive pulmonary disease (COPD) and lung cancer. COPD and lung cancer account for about 60% of all deaths attributable to tobacco. Therefore, correctly recognizing the harms of smoking and reducing smoking are of great significance in reducing the morbidity and mortality of respiratory diseases. Lung Cancer Lung cancer is one of the most common malignant tumors, and about 1 million people die of lung cancer every year in the world. According to the report of the main causes of death of urban and rural residents by the Ministry of Health of China in 2006. Malignant tumors have become the leading cause of death in China, and lung cancer ranks first among malignant tumors. Lung cancer is the malignant tumor with the highest incidence rate in the world today, and its incidence rate is still increasing rapidly in most countries. The incidence and death rates of lung cancer in China and its increase in the past 10 years have been in the first place of malignant tumors. The proportion of lung cancer in the total tumor death rate has been increasing year by year, from 18% in 1997 to 28% in 2002, and the growth rate of people over 50 years old has been accelerated obviously. There are many causes of lung cancer, such as smoking, ionizing radiation, atmospheric pollution, indoor micro-environmental pollution, carcinogens in food and hereditary factors, etc. However, attribution analysis reveals that smoking is the factor with the highest risk of lung cancer, and more than 85% of the deaths from lung cancer are caused by smoking. The mortality rate of those who smoke more than 25 cigarettes a day is 15 times of that of non-smokers, the mortality rate of those who smoke more (25 cigarettes a day or more) than those who smoke less (15 cigarettes a day or less) is 3 times higher, the higher the mortality rate of lung cancer, and the younger the age of the beginning of smoking is, the higher the incidence rate of lung cancer is. The medical profession believes that long-term smoking stimulates and damages the mucous membrane of the throat and trachea, introduces phlegm, cough and chronic bronchitis, etc., and makes the bronchial tubes and alveolar walls lose their elasticity, and the ventilation function decreases. Nitrosamines, thick cyclic aromatic hydrocarbons such as benzene and other substances in cigarette smoke can also directly or indirectly cause cancer. In particular, there is also a strong correlation between lung cancer and passive smoking. Passive smoking significantly increases the risk of lung cancer in women, and the incidence of lung cancer increases significantly as the passive smoking index and years of passive smoking increase. Passive smokers had a 24% increased risk of lung cancer, and for those with high exposure to environmental smoke, the relative risk increased twofold. Chronic Obstructive Pulmonary Disease (COPD) Chronic Obstructive Pulmonary Disease (COPD) is a common respiratory disease in which prolonged inhalation of noxious gases, causing an abnormal inflammatory response in the lungs, narrowing of the bronchial tubes to obstruct them, and a decrease in the elasticity and retraction of the lungs result in restricted airflow during expiration, which does not fully return to normal and gradually worsens. Early symptoms of patients are mainly cough, sputum, aggravated in fall and winter. Later on, there is a gradual decline in respiratory function, chest tightness after activity, shortness of breath, wheezing, and over time develop into pulmonary heart disease, and even respiratory failure. At present, there are about 270 million patients with chronic obstructive pulmonary disease (COPD) in the world. Chronic obstructive pulmonary disease is located in cardiovascular and cerebrovascular disease and acute respiratory disease, and AIDS is listed as the fourth major cause of death in the world. Smoking is the most important environmental factor in the development of COPD. According to foreign research, 15% ~ 20% of smokers suffer from COPD, and a large number of epidemiological studies at home and abroad have proved that the prevalence of COPD in smokers is 3 ~ 5 times higher than that in non-smokers. The larger the amount of smoking, the longer the smoking time, the deeper the inhalation of tobacco mist into the airway when smoking, the earlier the age of starting to smoke, the greater the risk of COPD. According to China’s survey, nearly 80% of male COPD is caused by smoking, while the main cause of female COPD is household air pollution and infection. In China today, there are about 42 million people with COPD, and 2.5 people die every minute as a result! The number of deaths per year reaches 1 million, and the number of disabilities is as high as 5 to 10 million. COPD is the fourth leading cause of death in urban China and the leading cause of death in rural areas. Unfortunately, the public’s awareness of COPD is very low, and patients often consult a doctor only when they have severe symptoms, when COPD is already in the middle or late stages.