Atmospheric CO2 hit new high in May

Have we reached another climate tipping point?
Last month, the amount of carbon dioxide in the Earth’s atmosphere reached its highest level in the 63-year history of measurements by the National Oceanic and Atmospheric Administration (NOAA).
According to the report, in May, NOAA’s measurements at its Mauna Loa observatory averaged 419.13 parts per million (ppm).
That compares with the average in May 2020 which was 417ppm.
Measurements for the first five months of 2021 also showed a 2