It is the sixth of the month, and I have the routine down.
Looking back exactly a year to counter seasonal oscillation as I always do, here are the results:
Atmospheric CO2
November 2023 420.46 ppm
November 2022 417.47 ppm
Annual change: +0.72% <===========================
Last updated: Dec 5, 2023
Source:
Global Monitoring Laboratory
We are cooking.

Ain't it a gas.