Carbon Dioxide: An Open Door Policy

A practical health post on indoor CO2. Scott's housemates had mysterious headaches/fatigue/poor sleep traced to high bedroom CO2 (1000-3000 ppm); opening windows + 'dark fixation' succulents helped. Reviews the research -- the Berkeley/Harvard studies finding big cognitive hits from poorly-ventilated air (and a real-office replication), the failed 2017 study and the submarine counterevidence, and Strom-Tejsen's CO2-and-sleep work (bedrooms hit 2000+ ppm at night; Gwern's and an MIT researcher's monitors confirm) -- with honest caveats (small n, manipulated stats). Recommends opening a bedroom door/window (or succulents), flags huge individual variability, and closes with a Bayesian-perception note on why writing it felt 'suffocate-y' (and why air-quality perception drives panic attacks).

Quality 68 · Strong. Strong (68). A useful, actionable, well-sourced practical-health post that models good practice (self-experiment + honest caveats + a registered reader quasi-experiment). Held mid-Strong: a synthesis of others' (weak) studies rather than deep original analysis.

Claude’s paradigm shift 46 · Moderate. Moderate (46). Synthesizes CO2-cognition/sleep research into a practical recommendation; the nighttime-bedroom-CO2 angle is a mildly fresh practical insight.

Real-world impact 2 · Minor. 2 -- minor/within-blog. Prompted some real behavior change (ventilation, CO2 monitors) in the readership; modest practical within-community uptake.