The smoke released by tobacco combustion contains more than 3,800 known chemical substances, most of which are harmful to human body, including alkaloids such as carbon monoxide and nicotine, amines, nitriles, drunkenness, phenols, alkanes, aldehydes, nitrogen oxides, polycyclic aromatic hydrocarbons, heterocyclic compounds, hydroxyl compounds, heavy metal elements, organic pesticides and so on. It has a wide range of biological functions and causes all kinds of harm to human body.
Smoke seriously damages human bronchus and causes bronchitis. Being in smog for a long time makes people feel chest tightness, breathlessness, mental fatigue, and even headache and dizziness, which seriously reduces human immunity to diseases and work efficiency.
People all over the world are very concerned about air pollution. Many professional surveys and scientific research data prove that air pollution is an important environmental factor for respiratory diseases and cardiovascular diseases. From the source analysis of air pollution, cigarette smoke is also an important air pollution besides industrial smoke and waste gas pollution, domestic fuel pollution such as coal burning and automobile exhaust pollution. This is not only the self-pollution of smokers, but also the passive pollution of non-smokers by cigarette smoke.
The comprehensive investigation report shows that smoking is an important reason for the increase of lung cancer in urban residents. According to population epidemiological survey, the risk of lung cancer death of smokers is about 8 ~ 15 times that of non-smokers. In some occupations, such as workers exposed to asbestos and uranium mines, smokers are at greater risk of lung tumors than non-smokers. Lung cancer is related to smoking and benzopyrene pollution, which is confirmed by medical follow-up. There are many carcinogens in cigarette smoke, such as polycyclic aromatic hydrocarbons such as benzopyrene, nitrosamines and azo impurities.
Three diseases that threaten human life and health: cerebrovascular disease, heart disease and cancer are all related to smoking. These three diseases are the three major causes of human death. It is urgent to strengthen research and eliminate the environmental factors of these diseases!