Agence France-Presse: The amount of greenhouse gases in Earth's atmosphere hit a new record high in 2012, continuing an ever-faster rise that is driving climate change, the UN weather agency said on Wednesday. "The concentrations are reaching once again record levels," Michel Jarraud, who heads the World Meteorological Organization (WMO), told reporters in Geneva. His organisation released its annual report on greenhouse gases on Wednesday, showing that concentrations of carbon dioxide (CO2), methane and nitrous oxide...