Heat, drought worsen smog in California, stalling decades of progress

November 10, 2014 1:01 PM

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Heat and extreme drought have worsened smog in California over the last year, stalling decades of progress toward cleaner air and increasing health risks.

The state's prolonged dry spells have brought more temperature inversions, with a layer of warmer air trapping cooler air below, concentrating pollution near the ground. Mother Nature could clear away much of the bad air with rain or wind, but high-pressure systems have resulted in fewer storms, les...

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