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Day 974

1/ Increases in wildfire smoke has reversed two decades of improvements to air quality in three-quarters of all U.S. states. New research shows that from 2000 to 2022, “wildfires have undone 25% of previous progress” that resulted from the Clean Air Act of 1963. A noticeable shift in the overall trend began in 2015 with wildfire smoke having a statistically significant effect on PM 2.5 – very small particles that can travel into the lungs and bloodstream – trends in 35 out of 48 continental states. Some states have rolled back 50% or more of their progress since 2000, while others have completely erased their gains. More than two billion people globally were exposed to a day or more of wildfire-related air pollution each year between 2010 and 2019. (NBC News / New York Times / Washington Post)

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