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At around 600-1000 ppm of CO2, air begins to negatively affect human performance. This fact is not hard to test. I think most people would agree that it would b
by njarboe 8y ago
At around 600-1000 ppm of CO2, air begins to negatively affect human performance. This fact is not hard to test. I think most people would agree that it would be a good thing not to get to that level so that human can still have natural fresh air.
- User23 8y agoThank you for this response. It's the first one with new information in it.
- kolinko 8y agoThis page is quite nice for some more info: https://www.co2.earth/ https://www.co2.earth/ A thing that blew my mind a few months ago... Next time you feel you need to open windows in your apartment to get some fresh air in, it means indoor co2 is probably somewhere between 800 and 1200. If you open all the windows to the max, or go outside, co2 ppm will lower to ~400ppm. You can't go any lower than that, and there are no air cleaners that can push it lower. This is the absolute minimum. When your parents were young, opening windows meant bringing co2 to 350ppm. When your grand-grand parents were young, and when old-time poets wrote about fresh air, for them it was 200ppm. Neither you or I experienced it, nor possibly ever will (without attaching ourselves to an oxygen tank).
- njarboe 8y agoCO2 levels have been at around 280ppm since shortly after the end of the last ice age (around 10k years ago) until we started burning coal seriously, ~1800AD. The last time we had 200ppm was during the ice age. Before writing and definitely before your grand-grand parents were young (vampires excepted).