A surge in atmospheric CO2 saw levels of greenhouse gases reach record levels in 2013, according to new figures. Concentrations of carbon dioxide in the atmosphere between 2012 and 2013 grew at their fastest rate since 1984. The World Meteorological Organisation (WMO) says that it highlights the need for a global climate treaty. But the UK’s energy secretary Ed Davey said that any such agreement might not contain legally binding […]