In this July 31, 2017 photo, a discarded doll lays amid scattered garbage on the shores of Guanabara Bay, in Rio de Janeiro,... This July 31, 2017 photo, shows the heavily polluted Jacarepagua lagoon, in Rio de Janeiro, Brazil. In it's Olympic bid, Rio ... In this July 31, 2017 photo, men transport their belongings on a boat over the polluted Jacarepagua lagoon, in Rio de Janeir... In this July 31, 2017 photo, a discarded sofa is seen in the polluted Jacarepagua lagoon, in Rio de Janeiro, Brazil. Rio pled... In tis July 31, 2017 photo, residents of Rio das Pedras neighborhood leave their boat moored on the polluted shore of Jacarep... In this July 31, 2017 photo, a trash barrier hold back the surface filth at the heavily polluted Jacarepagua lagoon, in Rio d... In this July 31, 2017 photo, a trash barrier hold back the surface filth of the heavily polluted Jacarepagua lagoon, in Rio d... This July 31, 2017 photo, shows the heavily the polluted Jacarepagua lagoon, in Rio de Janeiro, Brazil. Rio pledged in its Ol... In this July 31, 2017 photo, shows Rio das Pedras neighborhood on the shores of the heavily polluted Jacarepagua lagoog, in ... In this July 31, 2017 photo, a man motors his boat in the polluted Jacarepagua lagoon, in Rio de Janeiro, Brazil. Rio pledge... In this July 31, 2017 photo Biologist Mario Moscatelli speaks during an interview with the AP on the shores of Guanabara bay... In this July 31, 2017 photo, a discarded doll lays amid scattered garbage in Guanabara Bay, in Rio de Janeiro, Brazil. In it'... In this , July 31, 2017 photo, discarded sofas litter the shore of Guanabara bay, in Rio de Janeiro, Brazil. Rio pledged in i... This July 31, 2017 photo, shows the heavily polluted Jacarepagua lagoon, in Rio de Janeiro, Brazil. In it's Olympic bid, Rio ...
In this July 31, 2017 photo, a discarded doll lays amid scattered garbage on the shores of Guanabara Bay, in Rio de Janeiro, Brazil. In it's Olympic bid, Rio promised to clean up the bay and up its treatment of sewage, promises that were not kept. (AP Photo/Silvia Izquierdo) This July 31, 2017 photo, shows the heavily polluted Jacarepagua lagoon, in Rio de Janeiro, Brazil. In it's Olympic bid, Rio promised to clean up the bay and up its treatment of sewage, promises that were not kept. (AP Photo/Silvia Izquierdo) In this July 31, 2017 photo, men transport their belongings on a boat over the polluted Jacarepagua lagoon, in Rio de Janeiro, Brazil. Rio pledged in its Olympic bid to treat 80 percent of its water waste before the start of the Games, but it failed to deliver on that promise. (AP Photo/Silvia Izquierdo) In this July 31, 2017 photo, a discarded sofa is seen in the polluted Jacarepagua lagoon, in Rio de Janeiro, Brazil. Rio pledged in its Olympic bid to treat 80 percent of its water waste before the start of the Games a year ago, but it failed to deliver on that promise. (AP Photo/Silvia Izquierdo) In tis July 31, 2017 photo, residents of Rio das Pedras neighborhood leave their boat moored on the polluted shore of Jacarepagua lagoon, in Rio de Janeiro, Brazil. Rio pledged in its Olympic bid to treat 80 percent of its water waste before the start of the Games, but it failed to deliver on that promise. (AP Photo/Silvia Izquierdo) In this July 31, 2017 photo, a trash barrier hold back the surface filth at the heavily polluted Jacarepagua lagoon, in Rio de Janeiro, Brazil. Rio pledged in its Olympic bid to treat 80 percent of its water waste before the start of the Games, but it failed to deliver on that promise. (AP Photo/Silvia Izquierdo) In this July 31, 2017 photo, a trash barrier hold back the surface filth of the heavily polluted Jacarepagua lagoon, in Rio de Janeiro, Brazil. Rio pledged in its Olympic bid to treat 80 percent of its water waste before the start of the Games, but it failed to deliver on that promise. (AP Photo/Silvia Izquierdo) This July 31, 2017 photo, shows the heavily the polluted Jacarepagua lagoon, in Rio de Janeiro, Brazil. Rio pledged in its Olympic bid to treat 80 percent of its water waste before the start of the Games, but it failed to deliver on that promise. A study commissioned by The Associated Press shows dangerously high levels of contamination. (AP Photo/Silvia Izquierdo) In this July 31, 2017 photo, shows Rio das Pedras neighborhood on the shores of the heavily polluted Jacarepagua lagoog, in Rio de Janeiro, Brazil. In it's Olympic bid, Rio promised to clean up the bay and up its treatment of sewage, promises that were not kept. (AP Photo/Silvia Izquierdo) In this July 31, 2017 photo, a man motors his boat in the polluted Jacarepagua lagoon, in Rio de Janeiro, Brazil. Rio pledged in its Olympic bid to treat 80 percent of its water waste before the start of the Games, but it failed to deliver on that promise. (AP Photo/Silvia Izquierdo) In this July 31, 2017 photo Biologist Mario Moscatelli speaks during an interview with the AP on the shores of Guanabara bay, in Rio de Janeiro, Brazil. Rio pledged in its Olympic bid to treat 80 percent of its water waste before the start of the Games, but it failed to deliver on that promise. A study commissioned by The Associated Press showed dangerously high levels of contamination. (AP Photo/Silvia Izquierdo) In this July 31, 2017 photo, a discarded doll lays amid scattered garbage in Guanabara Bay, in Rio de Janeiro, Brazil. In it's Olympic bid, Rio promised to clean up the bay and up its treatment of sewage, promises that were not kept. (AP Photo/Silvia Izquierdo) In this , July 31, 2017 photo, discarded sofas litter the shore of Guanabara bay, in Rio de Janeiro, Brazil. Rio pledged in its Olympic bid to treat 80 percent of its water waste before the start of the Games, but it failed to deliver on that promise. (AP Photo/Silvia Izquierdo) This July 31, 2017 photo, shows the heavily polluted Jacarepagua lagoon, in Rio de Janeiro, Brazil. In it's Olympic bid, Rio promised to clean up the bay and up its treatment of sewage, promises that were not kept. (AP Photo/Silvia Izquierdo)