Climate unknown: If and when tipping points will come

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Source: http://feeds.newscientist.com/c/749/f/10897/s/19a50ccf/l/0L0Snewscientist0N0Carticle0Cmg212283520B70A0A0Eclimate0Eunknown0Eif0Eand0Ewhen0Etipping0Epoints0Ewill0Ecome0Bhtml0DDCMP0FOTC0Erss0Gnsref0Fonline0Enews/story01.htm

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