NASA satellite images highlight US air quality improvement with reduction of NO2
Green Car Congress
JUNE 27, 2014
They show how nitrogen dioxide concentrations during spring and summer months, averaged from 2005-2007, compare to the average from 2009-2011. The mission flew previously in 2011 over Baltimore, Maryland and Washington, DC; in 2013 over the San Joaquin Valley, California; and in 2013 over Houston, Texas.
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