Eliminating air pollution disparities requires more than emission reduction

03 June 2025, Version 1
This content is a preprint and has not undergone peer review at the time of posting.

Abstract

In the United States, people of color are disproportionately and unjustly exposed to air pollution due to structural racism. Historically, environmental policy has emphasized aggregate emission reductions; yet major emission reduction scenarios do not sufficiently mitigate relative exposure disparities. Here, we show that without focusing on relative disparity (percent difference) in exposure, the only way to clean the air and eliminate absolute exposure disparity is to eliminate all emissions (an unlikely outcome). We demonstrate that the relative disparity metric is ethically important and also a controllable societal feature that can reduce absolute disparity in exposure. We illustrate a range of approaches to air pollution policy that go beyond traditional emissions reductions to meaningfully address exposure disparities. These strategies should be at the center of the future U.S. environmental policy.

Keywords

Environmental Justice
Air Pollution
Exposure Science

Supplementary materials

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Supporting Information for: Eliminating air pollution disparities requires more than emission reduction
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The supporting information file includes: - Supporting text - Figures S1 to S5 - Table S1 - SI References
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