That same logic works for toxic fumes and plastic. The effects of 400ppm of CO2 are negligible on an individual basis, you get exposed to much worse in a close

That same logic works for toxic fumes and plastic. The effects of 400ppm of CO2 are negligible on an individual basis, you get exposed to much worse in a closed room. There are also regions of the world which will be spared by global warming I'm sure, if one is fine removing themselves from civilization.