I meant outside the room. It's hard to saturate a room in CO2 with a window opened and ventilation. Many big cities are working to improve air quality Having a

I meant outside the room. It's hard to saturate a room in CO2 with a window opened and ventilation. Many big cities are working to improve air quality Having all kind of material to improve locally and artificially the air, like air-conditioning, feels like a temporary hack for a bigger problem, adding even more pollution in the equation