I'm not the only one who gets kept awake at night about this, right? https://en.wikipedia.org/wiki/Carbon_dioxide_in_the_atmosphere_of_Earth#/media/File:Mauna_Loa_CO2_monthly_mean_concentration.svg

Not the graph itself—it's horrifying—but the misinterpretation of how urgent it is. At 500ppm, CO2 begins to have measurable impact on human cognition. We're almost there.

But it also means there's *no margin any more*. Any closed room now quickly results in CO2 issues in humans.

It's not a smooth, linear thing—we hit a point where it's a huge problem all of a sudden, with big consequences.