If you are talking about office environment then it's done by HVAC system and CO2 is often being monitored. Re blood, I said every day. Losing blood can have s

If you are talking about office environment then it's done by HVAC system and CO2 is often being monitored. Re blood, I said every day. Losing blood can have some benefits. Just like taking multivitamin can if you have high deficiency of something it contains, although you likely need higher dosage of that thing then. But you don't want to be doing it every day. I mean, I admit I'm less confident about that statement regarding losing blood that I am regarding multivitamins, but draining blood used to be popular for.. pretty much everything and modern medicine somehow got rid of that.