The global output of heat-trapping carbon dioxide jumped by the biggest amount on record, the US department of energy has calculated, in a sign of how weak the world's efforts have been at slowing man-made global warming.The new figures for 2010 mean that levels of greenhouse gases are higher than the worst case scenario outlined by climate experts just four years ago.
"The more we talk about the need to control emissions, the more they are growing," John Reilly, co-director of MIT's Joint Programme on the Science and Policy of Global Change, said.
So should we stop talking about it?
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