1前言随着我国经济的高速发展，城市内部及城市之间的社会往来和经济贸易日益频繁，城市中的客货运量和交通工具发展很快，促进了城市的发展，但也导致了城市环境的恶化。继成都市90年代初出现光化学烟雾事件后，1995年上海市也首次出现光化学烟雾，这主要是由大量小汽车排出的 1 Introduction With the rapid economic development in our country, the social contacts and economic trade between cities and cities have become increasingly frequent, the rapid growth of passenger and cargo traffic and transport facilities in cities has promoted the development of cities, but also led to the development of urban environment The deterioration. Following the incident of photochemical smog in Chengdu in the early 1990s, photochemical smog also appeared for the first time in Shanghai in 1995, mainly caused by a large number of cars