air quality

DC Area Has Some of the Worst Ozone Pollution in the CountryThe D.C. area's air quality has gotten better in the past 15 years, but there is still a lot of work to be done, according to the American Lung Association’s annual “State of the Air” report.
DC Among Most Air-Polluted U.S. CitiesThe American Lung Association is out with its annual Air Quality Report Card and, suffice it to stay, DC may need to stay after class.
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