Kayakers head out on the Rio Grande toward one of the international bridges that connect Laredo, Texas, and the town of Nuevo Laredo in Mexico. Raw sewage and animal carcasses float in the water.
Neena Satija/Texas Tribune
October 22, 2013 Since Mexico and the United States signed the North American Free Trade Agreement 20 years ago, the two countries have worked to clean up the waterway. The river makes up a large chunk of the border, but despite progress, massive amounts of raw sewage still enter the water each day.
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