Sterman is not talking about greed, selfishness, or some other vice.

斯特曼所说的不是人的贪婪、自私或其他罪恶。

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To stop it at 450 ppm, Sterman says, a level many scientists consider dangerously high, the world would have to cut emissions by around 80 percent by 2050.

斯特曼说，为了防止它上升到许多科学家都认为危险的450PPM的高水平，到2050年全世界要减少80%左右的排放。

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To stop it at 450 ppm, Sterman says, a level many scientists consider dangerously high, the world would have to cut emissions by around 80 percent by 2050.

斯特曼说，为了防止它上升到许多科学家都认为危险的450PPM的高水平，到2050年全世界要减少80%左右的排放。

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