引言马克思主义哲学讲过:“什么事物都是有两面性的。”汽车作为现代化交通工具,给人们的生产与生活带来十分舒适方便的同时,另一方面它的尾气排放物也给大气环境造成严重污染。经济发达城市机动车尾气污染已上升为主要的大气污染,过去以二氧化硫为主煤烟型污染转变为以一氧化碳、氮氧化物为主的机动车尾气污染和二氧化硫为主的煤烟型污染并重的格局。 Introduction Marxist philosophy has said: “Everything has two sides.” "As a modern means of transport, vehicles bring very comfort and convenience to people’s life and production, while on the other hand, their exhaust emissions also give the atmosphere The environment caused serious pollution. Motor vehicle exhaust pollution in economically developed cities has risen to the major air pollution. In the past, the conversion of mainly soot-based pollution into carbon monoxide and nitrogen oxide-based vehicle exhaust pollution and sulfur dioxide-based soot pollution pattern.