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现在,让我们来看一个世界上对排放限制最严格的地区:美国的加利福尼亚州。20年来,每当说起美国的排放控制,人们总会首先提到它。通过阅读你会看到,法规是如何促进了技术进步,排放法规及其严格的执行又是怎样收到实效的。 1980年,加州的登记车辆总数超过1700万辆,总行驶里程为1550亿英里。全州范围内车辆的平均排放值为:氢氧化物(NO_x),4.8克/英里;碳氢化合物(HC),5.5
Now let’s look at one of the world’s most restrictive regions for emissions: California in the United States. For twenty years, whenever it comes to controlling emissions in the United States, people always refer to it first. Through reading you will see how regulations have contributed to technological progress, how emissions regulations and their strict enforcement have received results. In 1980, California registered more than 17 million vehicles with a total mileage of 155 billion miles. The average vehicle emissions across the state are: Hydroxide (NO x), 4.8 g / mi; Hydrocarbons (HC), 5.5