A container ship is docked at the port of Los Angeles July 2 , 2008. The adjacent ports of Los Angeles and Long Beach, the United States' biggest, see nearly half of the nation's container traffic and are key to insuring goods made in China make it to retailers like Wal-Mart Stores Inc. But the ports hold another, less honorable distinction: They are the biggest polluters in Southern California. To match feature ENVIRONMENT-PORTS/ REUTERS/Mario Anzuoni (UNITED STATES)
REUTERS/MARIO ANZUONI