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Pollution
A local look at air pollution highlights inequalities within cities
High-resolution data on air quality are helping scientists and community groups understand and address disparities in pollution between neighborhoods
by Katherine Bourzac
June 20, 2021
| A version of this story appeared in
Volume 99, Issue 23
Credit: Adapted from Sally Pusede/Environ. Sci. Technol. | Levels of nitrogen dioxide in Houston vary widely. This map, made by overlaying a heat map (blue = lower NO2; red = higher NO2) of the pollutant over a satellite image, is from a study that showed that neighborhoods that are predominantly Hispanic have higher levels of NO2 than non-Hispanic, White neighborhoods.
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