Is U.S. Air Quality Improving? Here's What NASA Found

June 30, 2014 4:33 AM

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NASA reports that there has been a steady decline in air pollution throughout most of the eastern U.S., including Washington, D.C., and the 1-95 corridor, as of 2005.

The organization recently released images that illustrate the change in concentration of nitrogen oxide, a pollutant that's linked to adverse effects on the respiratory system.

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