The necessity and possibility of replacement of noble metals by rare earth elements in the automobile exhaust catalyst control technology were elucidated.

阐述了汽车尾气催化净化工艺中用稀土代替贵金属的必要性和可能性。

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This paper introduces the hazard of automobile exhaust pollutant, influential factors and normally control technology used abroad.

简要地介绍了汽车废气污染物的危害性和影响因素以及国外常用的废气排放控制技术。

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This paper introduces the impacts of automobile exhaust gas pollution, traffic noise, etc. on ecological environment and human healthy, and discusses their control countermeasure.

本文介绍了汽车排气污染、交通噪声等对生态环境和人类健康的危害，探讨了调控对策。

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