Pollution from California’s 2020 wildfires likely offset decades of air quality gains

It was a nightmare fire season that California won’t soon forget.
As more than 9,000 wildfires raged across the landscape, a canopy of smoke shrouded much of the state and drifted as far away as Boston.
All told, more than 4.3 million acres would be incinerated and more than 30 people killed. Economic losses would total more than $19 billion.

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