This story originally appeared on High Country News and is part of the Climate Desk collaboration.
The more researchers learn about wildfire smoke, the more worrisome the picture gets. Smoke contains microscopic particles known as PM 2.5 because the PM (particulate matter) measures 2.5 microns or less—small enough to easily wiggle its way into our lungs and then into our bloodstreams. Researchers have already connected the particulate matter in wildfire smoke to a higher risk of strokes, heart disease, respiratory disease, lung cancer, and other serious conditions.
And the harmful effects don’t stop there. 2024 was a banner year for research on wildfire
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