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flag 40% of U.S. PM 2.5-related premature deaths stem from pollution crossing state lines, a study finds.

flag A University of Notre Dame study finds 40% of PM 2.5-related premature deaths in the U.S. each year come from pollution crossing state lines, despite a 35% drop in overall air pollution since 1998. flag Using airshed analysis, researchers identify that more than half of U.S. states export pollution, with Florida, Vermont, and Iowa among top contributors, while states like California, Oregon, and Washington also impact neighboring regions. flag The tool helps track transboundary pollution and supports evidence-based policies to address unequal health risks, especially for downwind communities.

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