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Wildfire smoke PM2.5 is linked to ~24,100 deaths annually in the U.S., a 2026 study reports. Researchers found even small increases (0.1 µg/m³) raise mortality risk, with no safe exposure level identified, highlighting a growing public health threat as wildfire seasons intensify.

2026年4月2日 · 刘洋 · 来源：user资讯