All those Spare the Air days we had this winter have paid off. Authorities say there's been a decrease in air pollution. "We are seeing overall, across the Bay Area, a decrease in wood smoke levels according to our data," an Air Quality Management District official told CBS SF. "And our surveys are showing that about 25 percent of people are burning less on at least once instance throughout the year." The Air Quality Management District gave out 346 warnings letters and issued 13 tickets. [SF Appeal/CBS SF/photo via Shutterstock]
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