Is there evidence that CO2 levels in the air matter to human health? Humans can tolerate a fairly wide range of blood CO2 levels. We have a buffer system in our

Is there evidence that CO2 levels in the air matter to human health? Humans can tolerate a fairly wide range of blood CO2 levels. We have a buffer system in our blood, and we can use our kidneys to pick up the slack when ventilation (via the lungs) is suboptimal.