Carbon dioxide (CO2) in the atmosphere is now reaching levels 50% higher than when humanity began large-scale burning of fossil fuels during the industrial revolution. Recent measurements from the Mauna Loa observatory in Hawaii show that for several days in February and March 2021, atmospheric CO2 levels exceeded 417 parts per million (ppm). Pre-industrial levels were about 278ppm. In the coming weeks, CO2 levels will continue to increase further. As a result, 2021 is expected to be the first year on record that sees CO2 levels of more than 50% above pre-industrial levels for longer than a few days.
Carbon Brief 16th March 2021 read more »