It's still not clear what that will mean, and both Jackson and Obama have said they'd prefer Congress to take the lead on limiting CO2, but regulation remains a powerful weapon for environmentalists.

这意味着什么，仍然不明朗，而杰克逊和奥巴马都曾经表示，他们更希望国会能带头限制二氧化碳，然而，监管仍然是环保人士的有力武器。

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So it makes sense, intellectually, for President Obama and serious environmentalists to support nuclear power.

这就是为什么从理性的角度来看，奥巴马和环保主义者支持核能的原因。

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By acting to make national rules himself Mr Obama hopes to please environmentalists by cutting exhaust gases, which account for 16.4% of America's total emissions, by nearly a third.

作为制定国家相关规定的个人来讲，奥巴马希望取悦那些环保家，通过减少排放气体，减少几乎占美国的总排放的16.4%的三分之一。

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