目前城市大气污染已成为一种普遍现象,严重影响着全球生态环境质量,直接威胁着人类的健康,制约着城市的发展,引发了一系列震惊世界的公害事件,如伦敦烟雾事件、洛杉矶光化学烟雾事件等。我国也不例外,据调查,城市居民中引起死亡的呼吸道疾病和恶性肿瘤均 At present, urban air pollution has become a common phenomenon, which seriously affects the global ecological environment quality, directly threatening human health and restricting the development of the city, triggering a series of world-shaking public nuisance events such as London Smoke Incident, Los Angeles Photochemical Smog Events and so on. My country is no exception, according to the survey, respiratory diseases and malignancies causing death in urban residents