CO2 increase of 400ppm decreases cognitive function by >20% [1]

I frequently send this medium article [1] to friends + family for a basic dive into how CO2 affects our thinking and abilities at various levels in common areas.

The article cites a study [2] which graphs cognitive score for different activities at different CO2 concentrations. Each activity's cognitive score is worse at higher CO2 concentrations, EXCEPT "focused activity" or "Information search" (up to some point)

[1, note it is from 2016] https://medium.com/@joeljean/im-living-in-a-carbon-bubble-li... [2]https://pubmed.ncbi.nlm.nih.gov/26502459/