Falling levels of air pollution drove decline in California's tule fog

The Central Valley's heavy wintertime tule fog -- known for snarling traffic and closing schools -- has been on the decline over the past 30 years, and falling levels of air pollution are the cause, says a new study. The findings help explain the puzzling decades-long rise and fall in the number of 'fog days' affecting the region over the past century.

from Top Technology News -- ScienceDaily http://bit.ly/2U8HXYk
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