“Fresh air has around 0.04% CO2, while wearing masks more than 5 min bears a possible chronic exposure to carbon dioxide of 1.41% to 3.2% of the inhaled air.”
https://t.co/Bb7MP8b1lD — Chief Nerd (@TheChiefNerd) April 24, 2023 🤡🌎 safe and effective pic.twitter.com/odwH5Xr8nu — Clown World Today (@cwt_news) April 24, 2023