Their supposedly clean, green fuel has been gobbling up some of the choicest food crops, including corn, rape, and soya.

他们宣称清洁、绿色的能源已经吞噬了一些最好的粮食作物，包括玉米、油菜和大豆。

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Bio -diesel is one of the best substitute green fuel.

生物柴油是最接近石化柴油的绿色替代燃油。

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As a green fuel, ethanol is a good idea, but the sort that America produces is bad.

使用绿色能源乙醇，是个不错的主意，但是美国生产的方法不对头。

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At the same time, the availability of a cheap and relatively green fuel may push up global energy consumption.

ECONOMIST: Natural gas

Dr Venter maintains that artificial life forms could produce solutions to global problems such as green sources of fuel and climate change.

BBC: NEWS | Science/Nature | Patent sought on 'synthetic life'

Gore admits that the president has made progress on some green issues like fuel efficiency but has avoided the spotlight when it came to standing up for bigger causes.

FORBES: Al Gore Slams Obama On Climate Change