World Class Ports Mean World Class Smog

"The expanding rail yards east of Los Angeles, brimming with foreign cargo from the area's two ports, are a brawny symbol of Southern California's growing stature as one of the world's great crossroads of international trade. But the economic bonanza is exacting a rising price. Exhaust and soot from diesel locomotives, ships and planes are dirtying the air in neighborhoods from Wilmington to Commerce, threatening to undermine decades of progress toward healthful air."

Thanks to Erin Clark