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据联合国欧委会汽车能源与污染技术专家组会议资料,1/3的产生温室效应的二氧化碳排放发生在交通车辆上,而这种排放的一半是轿车和轻型汽车造成的。从70年代晚期起,美国就已经为轿车和轻型汽车制定了一些强制执行计划,被称之为“联合均衡燃油经济计划”,或简称 CAFE。目前 CAFE 标准是轿车为11.7km/L,轻型汽车为8.8km/L。大多数专家都认可,这种 CAFE 计划已经成功地改善了新车的燃油经济性,并减少了新车其它一些有害的碳排放物。但调查结果表明美国的消费者不太在乎车辆
According to a meeting of the UNECEC meeting on energy and pollution technologies of vehicles, one-third of the greenhouse gas-generated carbon dioxide emissions occur in transport vehicles, half of which is caused by cars and light vehicles. Since the late 1970s, the United States has enacted some enforcement plans for cars and light vehicles called “Joint Equilibrium Fuel Economy Plan” or CAFE for short. The current CAFE standard is 11.7km / L for sedans and 8.8km / L for light vehicles. Most experts agree that this CAFE program has successfully improved the fuel economy of new cars and reduced some of the other harmful carbon emissions of new cars. But the survey shows that consumers in the United States do not care much about vehicles