2 ms·
> if CO2 levels get up to around 700ppm which can happen in a few hours of going to bed, you will also wake up feeling less refreshed and groggy source?
by luc4sdreyer 8y ago
> if CO2 levels get up to around 700ppm which can happen in a few hours of going to bed, you will also wake up feeling less refreshed and groggy
source?