In this July 13, 2017 photo, men remove mud from a shallow canal so tourist boats will be able to move through in Xochimilco, in Mexico City. A late July report by the Universidad Autonoma Metropolitana (UAM), in collaboration with local NGO Controla tu Gobierno, indicates that most of the water being fed into Xochimilco’s canals comes from a water treatment plant known as Cerro de la Estrella, whose output contains “a high level of fecal coliform that indicate sewage.” (AP Photo/Marco Ugarte)
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