阻塞性肺疾病是慢性支气管炎、支气管哮喘和肺气肿三种疾病的总称。大气污染则是阻塞性肺疾病的直接原因或诱发原因。而阻塞性肺疾病又是肺心病的常见原因,约占80～90％。 国内外已有不少报告指出,大气污染严重期间SO_2污染的地区分布和阻塞性肺疾病发病率、死亡率呈显著的相关关系。我国死因分为56种20大类,我们主张在讨论大气SO_2 Obstructive pulmonary disease is a general term for three diseases, chronic bronchitis, bronchial asthma and emphysema. Air pollution is the direct cause or cause of obstructive pulmonary disease. Obstructive pulmonary disease is a common cause of pulmonary heart disease, accounting for about 80 ~ 90%. Many reports at home and abroad have pointed out that the distribution of SO 2 pollution during the serious air pollution period has a significant correlation with the incidence of obstructive pulmonary disease and mortality. The cause of death in our country is divided into 56 categories and 20 major categories. We advocate discussing the atmospheric SO_2