Kee Hinckley on Nostr: Study indicating students don’t learn well in rooms with over 700ppm carbon ...

Study indicating students don’t learn well in rooms with over 700ppm carbon dioxide. And over 1300 they definitely can’t learn (I’ve flown in planes with levels that high).

Study was done in 1893.

Like global warming, this stuff has been known for more than a century. It was just inconvenient to making excess profit. https://bird.makeup/users/mdc_martinus/statuses/1768598494216864164