You’ll have lower CO2 levels in a dense urban housing with windows open, than in a home in the middle of nowhere with the windows closed.
The issue isn’t the higher amount of CO2 in the ambient air in the cities (AIUI it is; marginally; but it doesn’t matter); it’s that CO2 is very good at concentrating in enclosed spaces.
literally only in the currently designed world dominated by large cars, which is equally outrageous. Nuke the entire nonsense system we have, let people have homes in yards, and force everyone to get around on bicycles and electric scooters and electric accessibility carts.
The issue isn’t the higher amount of CO2 in the ambient air in the cities (AIUI it is; marginally; but it doesn’t matter); it’s that CO2 is very good at concentrating in enclosed spaces.