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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. “ We are not aiming to let anyone off the hook. AR4 also affirmed that warming would have to be held to no more than 2 ºC to 2.4

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