evidence: Carbon dioxide measured at NOAA’s Mauna Loa Atmospheric Baseline Observatory peaked for 2022 at 421 parts per million in May, pushing the atmosphere further into territory not seen for millions of years, scientists from NOAA and Scripps Institution of Oceanography offsite link at the University of California San Diego announced today. [...] "It's depressing that we've lacked the collective will power to slow the relentless rise in CO2," said Keeling. "Fossil-fuel use may no longer be accelerating, but we are still racing at top speed towards a global catastrophe." [...] Despite decades of negotiation, the global community has been unable to significantly slow, let alone reverse, annual increases in atmospheric CO2 levels.