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Devil In The Details: Is Copenhagens 2 ºC Guardrail Obsolete?

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IPCC reference emissions scenarios, 2000—2100. A BBC article [ 9 ] upped the stakes on Thursday the 9 th with an article on carbon emissions that characterized “the lower target of 1.5 achieve a maximal average 2 ºC rise in worldwide temperatures, assuming peak years of 2011, 2015, and 2020. BBC: 15 December 2009. [

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Devil in the Details: World Leaders Scramble To Salvage and Shape Copenhagens UNFCCC Climate Summit

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ºF) above pre-industrial levels to avoid the most catastrophic effects of climate change, and that global GHG emissions would have to peak around 2020 and then sharply decline by 50% to 85% by the year 2050. AR4 also affirmed that warming would have to be held to no more than 2 ºC to 2.4

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