we are nowhere close to the levels of CO2 concentration that would affect cognitive performance.

skimming through a couple of studies, measurable impact starts around 1000 ppm. with current policy intervention, we will likely reach 550ppm by 2100

> Left unchallenged, the increasing rate of change could see the CO2 concentration increase to about 1000ppm by 2100.

https://www.imperial.ac.uk/grantham/publications/briefing-pa...

All right, but indoor concentrations are higher than outdoor. The higher the outdoor concentrations, the easier it is for indoor to exceed 1000 ppm.