The effects due to particulates are local and short term. The effects due to CO2 are global and long term. 400 ppm CO2 is indeed a real concern, but it does not

The effects due to particulates are local and short term. The effects due to CO2 are global and long term. 400 ppm CO2 is indeed a real concern, but it does not follow that locally high levels of toxic particulates are not a real concern.