“Not even a global pandemic could stop carbon dioxide concentrations from spiking. They reached historic levels yet again in May 2021, the month that scientists compare CO2 concentrations from year to year.” CO2 levels are at an all-time high — again.

+ Axios: Earth’s carbon dioxide levels hit 4.5 million-year high. (We should still give it a few more months to determine if this is just a temporary outlier in the data.)