Reducing emissions at the ports of Long Beach and Los Angeles

A container ship is docked in the Port of Los Angeles on Terminal Island. (Brian van der Brug / Los Angeles Times)

April 14, 2014 10:39 PM PT

The ports of L.A. and Long Beach are the largest single source of air pollution in the region.

Containers are double-stacked on rail cars on Terminal Island. (Brian van der Brug / Los Angeles Times)

Trucks cross the Commodore Schuyler F. Heim Bridge from Terminal Island. (Brian van der Brug / Los Angeles Times)

Containers are unloaded from a ship on a Port of Los Angeles pier. (Brian van der Brug / Los Angeles Times)

Container traffic moves by truck in the Port of Los Angeles. (Brian van der Brug / Los Angeles Times)