CO2 levels in the room I lived in was somehow unusually higher that that of the entire apartment

I marinated my brain in unhealthy CO2 levels for 6 months or so and still got a 4.0 gpa. Not flexing, but trying to show how much extra effort I had to put in to maintain that gpa, given the worsening brain fog and cognitive stress I kept facing throughout my stay here. Had to take a semester break in Spring 2026 to try and recover cognitively.