Interesting - thanks for the CO2 concentration link. I am curious what prior to 2019 looked like (eg: if it was a comparable size, yet dipped in 2019-2021) and is back to normal.
Have a look at the right hand chart. That shows the increase from 1960 until now. You couldn't spot 2020 by eyeballing the chart.
2020 was a 5% dip in the pace of the increase. It's like someone gained ten pounds in 2019, 9.5 pounds in 2020, and 10 pounds in 2021. CO2 emissions are analogous to a total gain, so a 5% one off cut isn't very meaningful.
