GERMANY-UN-ENVIRONMENT-IPCC-ENERGY-CLIMATE WARMING

Chairman of the Intergovernmental Panel on Climate Change (IPCC) Rajendra Pachauri (R) and Ottmar Edenhofer, co-Chair of the IPCC Working Group III (L) pose with a copy of the IPCC report "Climate Change 2014, Mitigation of Climate Change" during a press conference in Berlin on April 13, 2014. The world has a likely chance of meeting the UN's warming limit of two degrees Celsius (3.6 degrees Fahrenheit) if it cuts annual greenhouse gas emissions 40-70 percent by 2050, especially from energy, a top expert panel said Sunday, April 13, 2014. AFP PHOTO / JOHN MACDOUGALL (Photo credit should read JOHN MACDOUGALL/AFP via Getty Images)