News > Costa Rica crocodiles survive in 'most polluted' river

Costa Rica crocodiles survive in 'most polluted' river

In one of the most polluted rivers in Central America, a vulnerable crocodile species is thriving despite living in waters that have become a sewer for Costa Rica's capital, experts say. "The Tarcoles River is the most polluted river in Costa Rica, and one of the most contaminated in Central America. Heavy metals, nitrites, nitrates, and a large amount of human waste can be found," added the crocodile expert.