Comment Comment by londons_explore 100 ml / 4 liters = 2.5%.2.5% of CO2 laden air (~50,000 ppm) + 97.5% fresh air (420 ppm) = 1640ppm.1640 ppm of CO2 is very much into the 'feels drowsy and hard to concentrate' region. parent londons_explore 2 years ago
2.5% of CO2 laden air (~50,000 ppm) + 97.5% fresh air (420 ppm) = 1640ppm.
1640 ppm of CO2 is very much into the 'feels drowsy and hard to concentrate' region.