比如，美国采取管制的形式来控制汽车尾气排放，而欧洲采用征收燃料税的方法。

Vehicle emissions, for instance, are controlled by regulation in America, whereas they are mostly discouraged by fuel taxes in Europe.

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令人惊讶的是，他们也放弃了狂补酒精燃料的机会，就连征收碳税或者是控制温室气体的总量管制计划，他们都懒得考虑。

Surprisingly, they also passed up the opportunity to lavish more subsidies on ethanol. They did not even bother to consider a carbon tax or a cap-and-trade scheme for greenhouse gases.

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