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Global Change
Air quality better in Md., but smog still a problem
Air quality better in Md., but smog still a problem

Air quality has improved a lot in Maryland and nationwide over the past 15 years, according to a new report, but summertime smog levels in Harford and Prince George's counties are still among the worst in the country. Despite strides made virtually everywhere in reducing soot or particle pollution, nearly half of all Americans still live in places where smog or soot pollution makes it dangerous to breathe at times, the American Lung Association reported Wednesday in its 15th assessment of the nation's air quality. Maryland earned a passing grade from the health group for limiting residents' chronic exposure to particle pollution, which can cause respiratory and heart...

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