Geographic Variations in Urban-Rural Particulate Matter (PM_2.5) Concentrations in the United States, 2010-2019.

Despite showing an increasing trend, these latter areas were still within the threshold below the national air quality standard for PM 2.5 . 3.3 Differential Annual Trends by Community Characteristics in Rural and Urban Census Tracts In 2010, high Black communities (high percentage was defined as those census tracts whose percent pop

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