A rise in global temperatures of four degree Celsius is likely to occur during the 21st century causing "devastating impacts" if greenhouse gas emissions continue rising at the current rate, according to a group of international scientists.
In a special issue of the UK journal "Philosophical Transactions of the Royal Society A" -- which coincides with the start of the United Nations climate talks in Cancun, Mexico -- scientists argue that delays in reducing emissions is making the target of two degrees Celsius -- a rise currently deemed safe by scientists -- "extremely difficult" and "arguably impossible" to achieve.
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