In environmental news, U.S. scientists have determined the concentration of carbon dioxide in the atmosphere has reached a new record high. The BBC reports the precise level of carbon dioxide in the atmosphere is of global concern because scientists fear certain thresholds may be “tipping points” that trigger sudden changes in climate. The chief carbon dioxide analyst for the US National Oceanic and Atmospheric Administration says the latest data confirms a worrying trend. The British government’s chief scientific adviser, David King, said “Mankind is changing the climate”.