US air quality is slipping - Statesboro Herald

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US air quality is slipping

Years of improvement reversing

In this Friday, Nov. 9, 2018 file photo, people wear masks while walking through the Financial District in the smoke-filled air in San Francisco, as authorities issued an unhealthy air quality alert for parts of the San Francisco Bay Area as smoke from a massive wildfire drifts south. In 2017 and 2018, the nation had more polluted air days than just a few years earlier, federal data shows. - photo by Associated Press

air — In this Friday, Nov. 9, 2018 file photo, people wear masks while walking through the Financial District in the smoke-filled air in San Francisco, as authorities issued an unhealthy air quality alert for parts of the San Francisco Bay Area as smoke from a massive wildfire drifts south. In 2017 and 2018, the nation had more polluted air days than just a few years earlier, federal data shows. - photo by Associated Press

After decades of improvement, America's air may not be getting any cleaner.

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