For those who’ve been there, it’s a fact that will come as little surprise: the twin ports of Long Beach and Los Angeles account for the single largest fixed source of air pollution in Southern California, according to the South Coast Air Quality Management District. The numbers make this easier to understand: together the facilities handle roughly 40% of the USA’s container import traffic, and 25% of container export traffic. In 2017, the Port of Los Angeles moved the most cargo ever recorded in its 110-year history: a total of 9.3 million twenty-foot equivalent units (TEU)….