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Finished processing OMI NO2 globally for the past 15 years (including 2019!) Showing annually averaged NO2 for 2005, 2012, and 2019. The trends in a handful of cities are in the thread. Taking recommendations for other cities (within reason!)

Heavy-duty diesel vehicle NOx emissions during low-speed urban driving is more than five times the certification limit
Read more: Current state of NOx emissions from in-use heavy-duty diesel vehicles in the United States

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