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关注：1
2013-05-23 12:21
求翻译：A commonly cited goal is to stabilize GHG concentrations around 450-550 parts per million (ppm), or about twice pre-industrial levels. This is the point at which many believe the most damaging impacts of climate change can be avoided. Current concentrations are about 380 ppm, which means there isn't much time to lose.是什么意思？ 待解决
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A commonly cited goal is to stabilize GHG concentrations around 450-550 parts per million (ppm), or about twice pre-industrial levels. This is the point at which many believe the most damaging impacts of climate change can be avoided. Current concentrations are about 380 ppm, which means there isn't much time to lose.
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2013-05-23 12:21:38
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2013-05-23 12:23:18
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2013-05-23 12:24:58
一个共同地被援引的目标是在450-550份附近稳定GHG集中每百万(ppm)，或者关于两次前工业水平。 这是许多相信的点气候变化的最残损的冲击可以被避免。 当前集中是大约380 ppm，意味没有时候丢失。 根据IPCC，我们会必须减少GHG放射按50%到80%什么他们是在是轨道在到达这个水平的下个世纪。
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2013-05-23 12:26:38
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2013-05-23 12:28:18
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