美国汽车废气排放标准；
根据国内外经验，制订合适的汽车废气排放标准是控制大气污染措施之一。
To formulate an adaptable motor vehicle exhaust emission standard is one of the important events of air pollution control according to domestic and foreign experience.
另外10个州借鉴加里福利亚州汽车废气排放标准签署了共同文件，当中还包括加州有关温室气体的相关要求。
Ten states have signed up to follow California's standards on car exhaust, including its requirements on greenhouse gases.
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