美国交通系统能效政策

Transportation system efficiency policies in the United States

运输消耗的能源占世界全部能源消耗的1/4。在美国,客运汽车消耗了大量能源。客运汽车和卡车消耗了一半以上的运输能源。此外,石油产品几乎是美国运输业所需能源的全部来源。石油产品的巨大消耗和需求使得石油储备紧张,加重了外部压力并使得环境恶化。最终当石油产品的供应减少到比可替代能源费用更高时,依赖石油产品进行运输的成本会非常高,并且会继续导致环境恶化。实施能源效率措施并转向使用可替代燃料和电动汽车将会减缓运输的能源压力。

Transportation represents about one- quarter of worldwide energy consumption. The predominant energy-consum- ing transport mode consists of passenger vehicles, in the United Slates, passenger cars and trucks account for over half of the total transport energy use. Moreover, the transport sector is fueled al- most entirely hy petroleum products. This huge demand fur, and use of, petroleum puts a large strain on reserves, aggravates foreign tensions, and results in environmental degradation. Uhimately, the cost of utilizing petroleum products for transportation will be prohibitively high, as the supplies diminish to the point at which they are more expensive to employ than alternative forms, and as the environment continues to suffer. Implementing energy efficiency measures and shifting to alternative fuels and electric drive vehicles will alleviate some of these pressures.