"The Bronx Zoo agreed ... to stop polluting the Bronx River with water contaminated by animal waste, a problem that New York's attorney general, Eliot L. Spitzer, said had gone on for at least 20 years. Richard L. Lattis, general director of the Wildlife Conservation Society, which operates the Bronx Zoo, said the zoo did not know about its role in polluting the river until told by the attorney general's office two years ago." (Quoted from article)