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North America

Foxe Basin, Canada

North America

Environmental regulations on NOx emissions from automobiles and power plants in the United States led to a reduction in NO2 levels between 20 and 40% over American cities from 2005 to 2016.  In fact, the only significant increases over the U.S.

Image Credit: 
Jacques Descloitres, MODIS Rapid Response Team, NASA/GSFC

Washington D.C.

Change in NO2: 
-52.55
2020 Avg. NO2: 
3.83

Toronto

Change in NO2: 
-34.58
2020 Avg. NO2: 
5.04

San Francisco / San Jose

Change in NO2: 
-52.42
2020 Avg. NO2: 
2.64

Phoenix Mesa

Change in NO2: 
-58.92
2020 Avg. NO2: 
2.88

Philadelphia

Change in NO2: 
-57.04
2020 Avg. NO2: 
4.64

New York

Change in NO2: 
-56.00
2020 Avg. NO2: 
7.75

Miami

Change in NO2: 
-38.33
2020 Avg. NO2: 
1.54

Los Angeles

Change in NO2: 
-64.59
2020 Avg. NO2: 
6.88

Houston

Change in NO2: 
-32.14
2020 Avg. NO2: 
3.92