A Very Polluted River Runs Through It
The New River holds the dubious distinction of being called North America's most polluted river. It starts in Mexicali, Mexico, flows past homes in the California border town of Calexico and winds up in the Salton Sea. It is made up of 70% waste material and contains raw sewage, disease-causing bacteria, heavy metals and toxic chemicals. It is so dangerous that Border Patrol agents are not required to go in the river to stop illegal immigrants who use it as a "safe" crossing point.
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