The day I thought would never come….global atmospheric CO2 passes 400ppm
This year the NOAA reported that the daily carbon dioxide level had exceeded 400ppm. This is the highest concentration of this greenhouse gas in the atmosphere in at least 3 million years www.esrl.noaa.gov/gmd/ccgg/trends/weekly.html . It’s a day I once thought we would never see. When I started working as a climate scientist nearly 25 years […]