Inequalities in exposure to NO2 pollution (IMAGE) American Geophysical Union Caption Across 52 U.S. cities, large discrepancies in exposure to NO2 pollution exist between low-income communities of color and high-income white communities. The inequality is driven primarily by proximity to roadways with heavy diesel truck traffic, says a new study in Geophysical Research Letters. Credit Credit: Demetillo et al. (2021)/Geophysical Research Letters Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.