随着医学科学的发展,吸烟的危害越来越多地为科学家所证实。近几年,美、英、法、加拿大、瑞典等国的科学家,做了许多动物试验、人体病理解剖检查、人群统计,证明吸烟对人体危害很大。我国医学科学家通过临床实践和人群统计,也证实了吸烟的危害。国内外资料表明,烟草在点燃后产生的烟草雾含有烟硷、3—4苯并芘、亚硝胺、砷、钋、一氧化碳等有害物质达几十种,吸入后对人体的呼吸、心血管、胃肠、神经系统和肝、肾等器官,都有程度不同的损害,长期大量吸烟可以引起 With the development of medical science, the harm of smoking is more and more confirmed by scientists. In recent years, scientists from the United States, Britain, France, Canada, Sweden and other countries have done a lot of animal experiments, anatomical examination of human pathology and population statistics to prove that smoking is very harmful to human beings. Chinese medical scientists through clinical practice and population statistics, also confirmed the dangers of smoking. Domestic and foreign data show that the tobacco smoke produced after ignition contains nicotine, 3-4 benzopyrene, nitrosamines, arsenic, acenaphthene, carbon monoxide and other harmful substances up to dozens of inhalation of the human body after breathing, cardiovascular , Gastrointestinal, nervous system and liver, kidney and other organs, have different degrees of damage, long-term heavy smoking can cause