- Unprecedented levels of high-severity fire burn in Sierra Nevada. Research found that in low- and middle-elevation forest types, the average annual area that burned at low-to-moderate severity has decreased from more than 90 percent before 1850 to 60-70 percent today. https://www.ucdavis.edu/climate/news/unprecedented-levels-high-severity-fire-burn-sierra-nevada-forests 4 comments science
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