(THREAD) Important caveats about the recent NO2 decrease articles circulating on NYTimes and CNN (and maybe elsewhere). Personally, I think these articles are a bit deceiving and here’s why… nytimes.com/interactive/20… cnn.com/2020/03/23/hea… 1. I have seen some differences in #TROPOMI NO2 between years in non-COV19 months, perhaps related to other emission reduction strategies, or maybe other technical reasons. A 5% change unrelated to COVID-19 matters a lot! That is not accounted in articles above(and no colorbars!)