The NASA data shows particulate matter. The real pollutants are CO2 and other invisible gases. Why concentrate on the visible particulate matter? The real concern is 400 ppm CO2 in air.
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.
