Adding 48 billion gallons of biofuel would cover the rest of transportation energy.

加入480亿加仑的生物燃料将用于其余的运输能量。

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Or consider petroleum, which provides about 40 percent of the world's commercial energy and more than 95 percent of its transportation energy.

又或考虑石油，目前它提供了世界上大约40%的商业能源，以及超过95%的运输能源。

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Better design and wiser use of both mass transit systems and private vehicles will play an important part in helping America get more out of energy used for transportation.

对公共交通系统和私人汽车进行更好的设计及更合理的使用，会在帮助美国交通获得更多可用能量上发挥重要作用。

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Don Hillebrand is the director of transportation research at the Energy Department's Argonne National Laboratory near Chicago,Illinois.

VOA: special.2010.11.17

The Texas researchers estimated the energy intensity of preparing food from agriculture, transportation,processing and food sales.

VOA: special.2010.11.23

Meanwhile, even with economic and population growth, transportation energy demand is forecast to stay flat.

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Consider: 95% of all American transportation energy is supplied by oil.

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The transportation-energy landscape of two decades hence will require all of the above, and electrons, too.

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