Объяснение:
I marvel at all the different kinds of air pollution that humans invented (eg fires for light, heat, hunting, cooking and smoking).
we evolved for the last million years living with this air pollution, first around open campfires and then inside our homes but always in our lungs and blood at a relatively high chronic level compared with the last 40years in USA and other countries that followed EPA experiment of requiring strict air pollution controls on vehicles, factories and powerplants.
This air pollution—the high ambient CO in particular-- made us human and we won't be human anymore if it all goes away. We will be much closer to the wild animals we diverged from, since without high ambient CO to protect us, we are very vulnerable to low CO (quite the paradox!) and CO-sensitization syndromes like autism
