Failure to address comprehensively the problem of greenhouse gas emissions, however, exposes all generations, present and future, to incalculable risks.

然而，如果不能全面解决温室气体的排放问题，那么今世后代都将面临着无法估量的风险。

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And given our failure to act on greenhouse gases, there will be much more, and much worse, to come.

鉴于在温室气体问题上我们的行动已经失败，更多的更糟的情况就要到来。

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The absence of key players like Obama has cast a shadow, as has the relative failure of the 1997 "Kyoto Protocol" on limiting greenhouse gases, which was set in motion at the 1992 Rio summit.

CNN: Can Rio +20 solve world's environmental problems?