Atmospheric CO2 is currently around 421 ppm. Cognition is slightly affected at 2x that, and health largely unaffected until 5x or so. I believe even the weaker

Atmospheric CO2 is currently around 421 ppm. Cognition is slightly affected at 2x that, and health largely unaffected until 5x or so. I believe even the weaker climate goals are under 1.5x, so if atmospheric CO2 concentration hits 5x, we'll presumably see a lot more than a few CDC recommendations.