The LA Times reports, “Carbon dioxide in atmosphere did not break 400 ppm at Hawaii site.” They note:
“The National Oceanic and Atmospheric Administration (NOAA) revised its May 9 reading at the Mauna Loa observatory in Hawaii, saying it remained fractions of a point below the level of 400 ppm, at 399.89.”
The measurement stayed just under the 400 ppm mark! Do we breath a sigh of relief? Did we dodge a bullet? I mean, for the last 800,000 years we have never broken the 300 ppm level, so I am not sure that the revised measurement really makes me feel all that much better…