SAO GONCALO, BRAZIL - AUGUST 13: Birds are perched along a fisherman's community on a polluted inlet flowing to the polluted Guanabara Bay, the Rio 2016 Olympic Games sailing venue, on August 13, 2015 in Sao Goncalo, Brazil. Following sicknesses to U.S. athletes during a recent rowing event and a study showing dangerous amounts of viral levels in all Rio Olympic water venues, the IOC has controversially ruled out the possibility of viral testing of the sewage-laden waters ahead of the Olympics. (Photo by Mario Tama/Getty Images)
