After Failing Air Quality Report, Improvement Plan Suggested

Aug 4, 2015

Brown, smoggy air isn't just a southern California problem, as shown in this picture , looking east toward Oakland from San Francisco Bay.
Credit Jose C. Silva/Flickr

  Wildfire smoke is a temporary air quality issue, but as Suzanne Potter reports, the bigger problem of poor air  in much of California has a far more persistent cause.