Makes one wonder about the absurdly large number of physiological and psychological changes we've seen in people since the 70s-80s when AC started becoming comp

Makes one wonder about the absurdly large number of physiological and psychological changes we've seen in people since the 70s-80s when AC started becoming completely ubiquitous. Before that time, at least in warmer climates, you'd pretty much always have a window open. In some ways we've already been running a decades long high CO2 exposure experiment.