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机动车尾气排放的CO_2是全球气候变暖的原因之一。据2007年欧盟统计,机动车尾气排放的CO_2占到整个欧盟CO_2排放量的20%。为了降低机动车尾气排放量,自20世纪70年代,欧洲经济委员会(ECE)就开始对机动车尾气排放物制定了标准限值法规。1992年,欧盟在其成员国正式实施了有关机动车尾气排放的欧盟1号法规。2005年2月《京都议定书》强制生效之后,2007年欧盟又开始侧重
CO2 emissions from motor vehicle exhaust are one of the reasons for global warming. According to the 2007 EU statistics, CO 2 emissions from motor vehicles account for 20% of the total CO 2 emissions in the EU. To reduce the amount of motor vehicle emissions, the European Economic Commission (ECE) has since 1970s put in place standard limits on motor vehicle emissions. In 1992, the EU formally implemented EU No. 1 regulation on vehicle exhaust emissions in its member states. After the “Kyoto Protocol” came into force in February 2005, the EU started to focus again in 2007