COV shutdown will tell us a lot about CO2

[Undertoad]

I just realized - we're seeing clear skies in Chinese and Indian cities, clear water in Venice, etc. The pollution has ramped way down for a quarter -- and we are going to learn a bunch of things! Will the Mauna Loa CO2 graph be affected? This should tell us a lot about how much current CO2 in the atmosphere is man-made and what efforts to curtail it will do.