Carbon dioxide levels hit 50% higher than pre-industrial time

The National Oceanic and Atmospheric Administration said the average carbon dioxide level for May was 419.13 parts per million. That's 1.82 parts per million higher than May 2020 and 50 per cent higher than the stable pre-industrial levels of 280 parts per million, said NOAA climate scientist Pieter Tans.

source https://www.cbc.ca/news/science/carbon-dioxide-pre-industrial-era-1.6056414?cmp=rss