Increased CO2 levels in the air will reduce mental performance. I mean it isn't a ton unless you are seriously sealed up, and I don't know about particulates an

Increased CO2 levels in the air will reduce mental performance. I mean it isn't a ton unless you are seriously sealed up, and I don't know about particulates and other pollution. But a poorly ventilated room can have CO2 level rise double that of a well ventilated room and has been measured both in actual rooms and building CO2 levels and with subjects being tested for mental performance under experimental conditions with controlled CO2 levels.