Scientists have warned that global temperatures could rise by six degrees Celsius by the end of the century, four degrees higher than previously predicted and at a level that could wipe out species and cause widespread natural disasters. In addition, the study by the Global Carbon Project (GCP) said on Wednesday, that the ability of the world's forests and oceans to absorb carbon emissions was declining. The paper, published in the journal Nature Geoscience , comes in the run up to UN talks in Copenhagen, Denmark, aimed at crafting a pact to combat climate change from 2013. It said pollution "continued to track the average of the most carbon-intensive family of scenarios" put forward by the UN's Intergovernmental Panel on Climate Change (IPCC). Extreme scenario Professor Corinne Le Quéré, the lead author of the study from the British Antarctic Survey, said: "The projections of climate that have been made before are always based on scenarios of climate
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