Global CO2 levels reach 400 ppm for the first time
The global average concentration of carbon dioxide (CO2) reached the 400 ppm level for the first time in 2015, UN World Meteorological Organisation (WMO) said on Monday. An observatory has predicted that CO2 concentrations will stay above 400 ppm for the whole of 2016, WMO stated. "The technology is there... We can do it", an official said about cutting emissions.