近些年来,世界各国的科学家们作了大量的社会调查和科学实验,证明了吸烟的危害性。吸烟能够诱发和加重疾病,降低人民的健康水平,甚至影响人们的生命力,危害很大。根据世界举行的第四届国际吸烟与健康会议的各国代表报告,美国每年有三十五万人因吸烟致病而死亡;在瑞典因吸烟致病而死亡的人数占人口总死 In recent years, scientists from all over the world have made a large number of social surveys and scientific experiments to prove the dangers of smoking. Smoking can induce and aggravate diseases, reduce people’s health level, and even affect people’s vitality, which is very harmful. According to reports from delegates to the Fourth International Conference on Smoking and Health held in the world, there are 350,000 people die each year due to smoking in the United States; the total number of deaths from smoking-causing diseases in Sweden