Pollution, much like wealth, is not distributed equally in the United States.

Scientists and policymakers have long known that black and Hispanic Americans tend to live in neighborhoods with more pollution of all kinds, than white Americans. And because pollution exposure can cause a range of health problems, this inequity could be a driver of unequal health outcomes across the U.S.

A study published Monday in the journal PNAS adds a new twist to the pollution problem by looking at consumption. While we tend to think of factories or power plants as the source of pollution, those polluters wouldn’t exist without consumer demand for their products.

The researchers found that air pollution is disproportionately caused by white Americans’ consumption of goods and services, but disproportionately inhaled by black and Hispanic Americans.

“This paper is exciting and really quite novel,” says Anjum Hajat, an epidemiologist at the University of Washington who was not involved in the study. “Inequity in exposure to air pollution is well documented, but this study brings in the consumption angle.”

Study Finds Racial Gap Between Who Causes Air Pollution And Who Breathes It

Photo: Dave G. Kelly/Getty Images
Caption: An elevated view of smog and air pollution in Los Angeles.