Record surge in CO2 through 2015 and 2016 saw atmospheric concentrations rise fast than 2 parts per million average to well above 400ppm
FEATURE: The Earth entered uncharted territory when CO2 levels hit 400ppm for the first time. So what does the milestone mean?
The Keeling Curve has measured atmospheric CO2 since 1958, but without urgent funding climate science would lose a vital tool
The RTCC team reflect on a year which broke records, stunned climate experts and left Russell Brand steaming
As world passes an atmospheric concentration of CO2 not seen for more than 3 million years, there are calls for politicians to pay more attention to the science
Hitting the 400ppm level of atmospheric CO2 can be more than symbolic, it can be a rallying call too, writes Johan L. Kuylenstierna, executive director of the Stockholm Environment Institute