Washington Getting a Summertime Air Quality Exam

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NASAs Aura satellite can see several different forms of air pollution worldwide. This image shows high levels of nitrogen dioxide on the U.S. East Coast in 2005. Credit: NASA
NASA's Aura satellite can see several different forms of air pollution worldwide. This image shows high levels of nitrogen dioxide on the U.S. East Coast in 2005. Credit: NASA

Summer in the city can often mean sweltering "bad air days" that threaten the health of the elderly, children and those with respiratory problems. This summer the nation’s capitol has been no stranger to such severe air-quality alerts.


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