Well, it is a global problem, so I thought we ought to provide some statistics that show that.

这是一个全球性的问题，所以我认为，我们应该提供一些数据来证明这一点。

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This is not something we can tackle from the beach here in Sierra Leone, as it is a global problem.

这不是我们在塞拉利昂海滩上能对付得了的问题，这是一个全球难题。

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The trouble with the global warming debate is that it has become a moral problem when it's really engineering one.

全球变暖的争论的问题在于，它已经成为了一个道德问题，但实际上它是一个工程学问题。

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And, it is a global problem of some magnitude as the effects are not limited to any one society or even continent.

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It is a global problem, yet is experienced in a personal way.

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But desertification is not limited to China and it is fast becoming a serious global problem that will only be exacerbated by climate change.

CNN: Desertification: How to stop the shifting sands