FILE - In this June 24, 2010 file photo, the Los Angeles skyline is seen above the Union Pacific Railroad East Los Angeles Intermodal facility in the City of in Commerce, Calif. A long-term plan for cleaning up the air in a huge swath of smoggy Southern California is due for consideration by regulators. Directors of the South Coast Air Quality Management District are expected to vote on the plan Friday, March 3, 2017. (AP Photo/Damian Dovarganes, File)
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