轨道交通对减少城市环境污染经济损失的作用

随着经济的发展，机动车尾气对于城市环境的危害已是公认的事实，但就对人类健康的具体影响少见阐述，其对环境危害究竞多大的定量分析并不清晰也不多见。此文试从环境工程学角度研究对此进行剖析。根据历年经济、交通数据，分析、预测中国城市经济和机动车交通发展的现状和趋势，发现中国城市机动车交通即将进入一个高速增长的爆发期，从而造成中国城市空气污染问题恶化，轨道交通的发展可以改善这一状况，减少因城市空气污染问题恶化而造成的巨大经济损失。

Role of rail transit in reducing economic loss of urban environmental pollution

Along with the economic development, the harm of auto tail gas to the urban environment is a generally recognized fact, but the specific influence of it on human health is rarely described, neither is the quantitative analysis of the harm to environment frequently seen. This article tries to conduct an analysis of the same from the angle of environment engineering. Based on economic and traffic data of the previous years, analysis and forecast are made of the current status and the trend of development of the economy and motor vehicle traffic of Chinese cities to find that the auto traffic of the cities will enter an explosive period of high speed growth to aggravate the air pollution therein. However, the development of rail transit can improve this situation and reduce the heavy economic loss caused by the deterioration of the urban air pollution.