Disparities in a common air pollutant are visible from space

As a global center for petrochemical manufacturing, Houston, Texas, experiences some of the worst air quality in the country, according to the U.S. Environmental Protection Agency. Evidence suggests that air pollution disproportionately affects low-income, non-white and Hispanic residents, but it’s difficult to directly observe differences in pollutants between neighborhoods. Now, researchers reporting in Environmental Science & Technology have used airplanes and a satellite to uncover disparities in nitrogen dioxide amounts in the atmosphere above Houston.

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