SAN DIEGO (Border Report) -- During a brief storm last month, a trash boom in the Tijuana River managed to stop 20 tons of trash and debris from entering California.

Historically, during rain events in the San Diego-Tijuana region, water flows from south of the border into the U.S. carrying tons of plastic, tires and other debris.

Last year, as a way to stop the pollution, a 1,200-foot trash boom was strung across the river bed by Alter Terra, a binational environmental group.

Sections of the boom float according to the level of the river — its fence-like partitions stop the trash from flowing farther into the Tijuana River Valley and the Pacific Ocean.

During the last rainy season, the boom stopped 500 tons of trash, which was hailed as a huge success.

In preparation for the upcoming

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