Reminder: open your windows.
Yes, I know it’s cold. (Wisconsin has been below 0 (-17C) all week).
It’s amazing how much CO2 accumulates pretty rapidly, from only 1 human in a typical room space. Improved immunity, and less dirt, dust, allergens, mold, you get the idea.
The centuries-old German practice is trending on TikTok, and for good reason.
