A new instrument launched by NASA can give detailed updates on air quality for much of North America, showing disparities in pollution.
About 22,000 miles above the equator, NASA's Tropospheric Emissions: Monitoring of Pollution instrument has started returning images and data showing the concentration of pollution in U.S. urban centers.
For instance, the photo above shows excessive amounts of nitrogen dioxide gas in the Los Angeles area, but much lower densities outside the metro area. This image was taken just after the 9 a.m. rush hour. Nitrogen dioxide is among the various atmospheric gases the instrument can detect.
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