Smoke is normal for the 1800s

Orygun

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http://www.sacbee.com/378/story/1066675.html

No one in Colfax or Auburn will breathe a whit easier knowing this, but the heavy wildfire smoke that gave their towns a carbon black eye on the Air Quality Index on Monday is historically the norm for the foothills, studies show.

Analysis of tree rings and oral histories of American Indians and Euro-American surveyors suggests that the cobalt blue skies typifying the Sierra today were more the exception up through the 19th century.
 





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