Global carbon dioxide levels set to pass 400ppm milestone
Global carbon dioxide levels set to pass 400ppm milestone The concentration of carbon in the atmosphere over the next few days is expected to hit record levels Share 846 inShare.26 Email John Vidal The Guardian, Monday 29 April 2013 20.32 BST MAUNA LOA OBSERVATORY Hawaii’s Mauna Loa observatory, where record CO2 increases are being documented. Continue Reading →