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Wildfire smoke's PM2.5 causes about 24,100 U.S. deaths yearly, linked to climate change and lack of federal regulation.
A new study published in Science Advances links chronic exposure to wildfire smoke's fine particulate matter (PM2.5) to an average of 24,100 deaths annually in the lower 48 U.S. states from 2006 to 2020.
Researchers found that for every 0.1 microgram per cubic meter increase in PM2.5 from wildfires, about 5,594 additional deaths occurred each year, with the strongest health impacts tied to neurological conditions.
The study highlights growing public health risks due to climate change, more frequent wildfires, and development in fire-prone areas.
While county-level data and controls for other causes were used, limitations include uneven smoke distribution and lack of data on smoking.
Experts stress the need for stronger federal regulation of wildfire-related PM2.5, which currently falls outside EPA oversight.
El humo PM2.5 de los incendios forestales causa alrededor de 24,100 muertes en Estados Unidos anualmente, vinculadas al cambio climático y a la falta de regulación federal.