A new study shows people of color are more exposed to air pollution than Whites from all sources.
Using government air pollution and census data, researchers found that disproportionate numbers of non-white people were exposed to potentially hazardous fine particle pollution from nearly all major U.S. emission sources, regardless of where they live or how much money they make. The study, published Wednesday in the journal Science Advances, also found that Blacks were the only group disproportionately exposed to each of the pollution sources examined. Researchers found that on average Black, Hispanic and Asian people were exposed to higher than average levels of fine particle pollution, while white people were subjected to lower than average levels. “It doesn’t matter how poor, it doesn’t matter how wealthy, the racial disparities exist for all African-Americans and other people of color,” said Paul Mohai, a professor of environmental justice at the University of Michigan who was not involved with the study. He’s researched racial disparities in the distribution of hazardous waste dumps, industrial facilities and air pollution at schools — and why and how these disparities exist. “When you look at the impact of air pollution in the U.S. from all the sources that contribute to fine particulate matter in the atmosphere, there is an overall systemic bias against people of color,” said study co-author Jason Hill, a biosystems engineering professor at the University of Minnesota.
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Particulate pollution comes from many sources, from truck and bus exhaust to coal fired plants. It can cause health problems, from asthma to heart attacks. Other studies have shown non-White people are subjected to more pollution but this study broke it down to the source.
he researchers sorted the Environmental Protection Agency’s emissions inventory of over 5,000 types of fine particulate matter into 14 sources such as industry, passenger cars, diesel trucks, construction and agriculture. Then they modeled exposure to those pollution sources by calculating average ambient air quality levels for racial groups based on their residential locations in 2014. “Given that we have this national inequity in pollution exposure, what (sources are) actually driving that?” Hill said. “What this paper shows is that it’s pretty much everything.” When looking at exposure disparities in urban areas, researchers found a notable exception: Asians are less exposed to particulate matter than average in urban areas in California such as San Francisco, Los Angeles and San Jose. The study didn’t examine the cause of this, said lead author Christopher Tessum, an environmental engineering professor at University of Illinois Urbana-Champaign.
The study was released the day after President Biden held his online session with world leaders on shaping policies to avoid the disparity between the people of color and Whites.
Hill said policymakers can use the study’s findings to help make the case for tougher federal and state standards for regulating air pollution. “This is something that needs to be done at a national level,” he said in an interview. Said University of Virginia Economics Professor Jonathan Colmer: “By decomposing disparities in fine particulate matter into their component sources, their research shines a light on where researchers, policymakers, and communities might focus efforts going forward.” Colmer, lead author on a 2020 paper about disparities in air pollution, was not part of the new study.
Other studies have shown differences by race but not by income level while this study did show income level as a predictor.
He said the disparities in air pollution exposure are part of “a long history of slavery and racial discrimination in the U.S.” “We started to see a pattern with the history of racial discrimination and segregation of industry being located where people of color are concentrated,” Mohai said. “Racism isn’t just about racial animus. It’s about not caring about the welfare of people of other races and I think that’s been a factor.”
As we move away from oil to renewables some of this disparity may disappear but we will always have plants that discharge hazardous material and their citing will determine if change is coming.
