It may be winter but at the climate summit in Denmark the heat is on to slow the pace of global warming.Outside, too, temperatures are rising – literally. The World Meteorological Organisation said this decade is the hottest ever. Secretary General Michel Jarraud warned: “The decade 2000-2009 is very likely to be the warmest on record. So, in other words, this decade is going to be warmer than the 1990s, which itself was warmer than the 1980s and so on. So it is likely to be the warmest on record.” The US space agency Nasa suggested that a new world temperature record could be set within the next one or two years. But the burning question in Copenhagen is; who will foot the bill for the emission cuts to bring climate change under control? Developing countries argue that as the industrialised world with its polluting power plants has caused the problem, it should pay. Meanwhile, making a splash at the summit, the Angry Mermaid organisation – which took its name from Copenhagen’s famous statue – will nominate the biggest negative influence at the talks.