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Feature Cover story a planet on the edge Maintaining the planet’s stable climate would seem like a good idea. Scientists have now identified what they think are the nine Earth systems that do just that. But it looks
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Document Date: 2013-08-13 04:38:24
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Feature Cover story a planet on the edge Maintaining the planet’s stable climate would seem like a good idea. Scientists have now identified what they think are the nine Earth systems that do just that. But it looks