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The original was posted on /r/science by /u/Wagamaga on 2023-12-05 17:59:20.

Original Title: 2 decades of air quality gains in western U.S. wiped out by wildfires. Black carbon concentrations have risen 55% on an annual basis, mostly due to the wildfires. The fires have also caused an increase of 670 premature deaths per year in the region in the two-decade span.