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Racial disparities in air pollution exposure

PNAS Science Sessions

CHAPTER

Introduction

Pungfei Liu: Levels of nitrogen dioxide, or NO2, have been falling in the U.S. But this decline has not been equal across all racial and ethnic groups. Nitrogen dioxide is one of the criteria airports regulated by the US EPA. Breathing air with a high concentration of nitrogen dioxide can irritateAirways in the human respiratory systems.

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