The trick is to keep very light pressure on the gas pedal, just enough to feed a steady amount of fuel to the engine.

技巧是在油门上轻施压力，仅够供给引擎稳定量的燃料。

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Researchers hope that the hydrogen products of that reaction might go beyond launching rockets, and also feed hydrogen fuel cells for long duration space missions.

研究者希望化学反应后产生的氢，不仅能发射火箭，也能为长时间的空间任务补充氢电池。

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This paper pointed out: that using sugarcane to produce fuel alcohol will not employ the food of human and the feed of domestic animals.

前言： 本文指出，用甘蔗生产燃料乙醇，不会占用人的食粮和禽畜饲料，不会减少制糖原料和糖产量；

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"It's not our long-term solution because of the competition with feed, and fuel competition, but it is prompting us to put into place a refueling infrastructure that could be used with cellulosic ethanol, " made from other types of plant material such as timber waste or switch grass.

CNN: Ethanol: Is it friend or foe?

One of his projects has been to create a coalition of governments, corporations and non-profits to develop cheap, hygienic cooking stoves for the millions of women around the world who have to forage for fuel to feed their families.

ECONOMIST: American diplomacy

Tourism is creating other problems for the local environment, too, including increased population density, over-dependence on wood as a fuel and construction source and the overgrazing and cutting of mountain slopes to feed livestock.

BBC: Everest's growing problem