Dead fish are pictured next a rowing paddle of the Vasco da Gama club during a training session at the Rodrigo de Freitas lagoon, in Rio de Janeiro April 13, 2015. About 500 Kg of fish have been removed from the lagoon since last week after sea cold water got into the lagoon, authorities said, according to local media. Rodrigo de Freitas lagoon will host the rowing and canoe sprint competitions in the 2016 Olympic Games. REUTERS/Ricardo Moraes TPX IMAGES OF THE DAY

Dead fish are pictured next to a rowing athlete as he puts his boat on the water before a training session at the Rodrigo de Freitas lagoon, in Rio de Janeiro April 13, 2015. About 500kg of fish have been removed from the lagoon since last week after sea cold water got into the lagoon, authorities said, according to local media. Rodrigo de Freitas lagoon will host the rowing and canoe sprint competitions in the 2016 Olympic Games. REUTERS/Ricardo Moraes TPX IMAGES OF THE DAY

Rubbish is pictured at Bica beach, on the banks of the Guanabara Bay, with the Sugar Loaf mountain in background, 500 days ahead the Rio 2016 Olympic Games in Rio de Janeiro March 24, 2015. As part of its Olympic bid, Rio promised to clean up 80 percent of the bay for the games. But local government officials have already admitted that a cleanup by 2016 is not achievable. Despite millions of dollars of investment over the years, the bay still stinks of sewage. Sailors who visited the city for test events complained of a floating sofa and a dead dog in the water. To match OLYMPICS-BRAZIL/RUBBISH REUTERS/Ricardo Moraes 

Rubbish is pictured at Fundao beach, on the banks of the Guanabara Bay, in Rio de Janeiro March 31, 2015. As part of its Olympic bid, Rio promised to clean up 80 percent of the bay for the games, where will be host the sailing event. But local government officials have already admitted that a cleanup by 2016 is not achievable. REUTERS/Sergio Moraes 

A sofa and rubbish covers the banks of Cunha channel, which flows into Guanabara Bay, in Rio de Janeiro March 31, 2015. As part of its Olympic bid, Rio promised to clean up 80 percent of the bay for the games, where will be host the sailing event. But local government officials have already admitted that a cleanup by 2016 is not achievable. REUTERS/Sergio Moraes

A sofa floats in the polluted waters of Jacarepagua Lagoon, during a press tour in Rio de Janeiro, March 9, 2015. A press tour was organised by biologist Mario Moscatelli, to call attention to pollution on the waters of the lagoons which surround the Rio 2016 Olympic Park. REUTERS/Ricardo Moraes (BRAZIL - Tags: SPORT OLYMPICS ENVIRONMENT) 

Rubbish covers the banks of Cunha channel, which flows into Guanabara Bay, during a press tour in Rio de Janeiro, March 10, 2015. A press tour was organised by biologist Mario Moscatelli, to call attention to pollution on the waters of Guanabara Bay, where the Rio 2016 Olympic Games sailing events will take place. REUTERS/Ricardo Moraes (BRAZIL - Tags: SPORT OLYMPICS ENVIRONMENT) 

Rubbish is pictured on the banks of Cunha channel, which flows into Guanabara Bay, during a press tour in Rio de Janeiro, March 10, 2015. A press tour was organised by biologist Mario Moscatelli, to call attention to pollution on the waters of Guanabara Bay, where the Rio 2016 Olympic Games sailing events will take place. REUTERS/Ricardo Moraes (BRAZIL - Tags: SPORT OLYMPICS ENVIRONMENT) 

A toy is seen at Pombeba island in the Guanabara Bay in Rio de Janeiro March 12, 2014. According to the local media, the city of Rio de Janeiro continues to face criticism locally and abroad that the bodies of water it plans to use for competition in the 2016 Olympic Games are too polluted to host events. Untreated sewage and trash frequently find their way into the Atlantic waters of Copacabana Beach and Guanabara Bay - both future sites to events such as marathon swimming, sailing and triathlon events. Picture taken on March 12, 2014. REUTERS/Sergio Moraes (BRAZIL - Tags: ENVIRONMENT SPORT OLYMPICS) 

Dead fish lied next to a soccer ball on the banks of the Guanabara Bay in Rio de Janeiro February 24, 2015. International Olympic Committee members meeting in Rio de Janeiro this week will understand if its waters are not completely clean for the sailing events in 2016, the state's governor said on Monday. REUTERS/Ricardo Moraes (BRAZIL - Tags: SPORT OLYMPICS ENVIRONMENT ANIMALS) 

Rubbish are seen on the banks of Rodrigo de Freitas Lagoon in Rio de Janeiro August 13, 2014. According to local media, the waters of the the lagoon is not suitable for any sporting activities since July 31 due to pollution. The lagoon is one of the aquatic sports venues for the Rio 2016 Olympic Games. REUTERS/Ricardo Moraes (BRAZIL - Tags: SPORT OLYMPICS ENVIRONMENT) 

Men ride a boat on Jacarepagua Lagoon, next to a barrier to collect rubbish, during a press tour in Rio de Janeiro, March 9, 2015. A press tour was organised by biologist Mario Moscatelli, to call attention to pollution on the waters of the lagoons which surround the Rio 2016 Olympic Park. REUTERS/Ricardo Moraes (BRAZIL - Tags: SPORT OLYMPICS ENVIRONMENT) 

Rubbish covers the banks of Cunha channel, which flows into Guanabara Bay, during a press tour in Rio de Janeiro, March 10, 2015. A press tour was organised by biologist Mario Moscatelli, to call attention to pollution on the waters of Guanabara Bay, where the Rio 2016 Olympic Games sailing events will take place. REUTERS/Ricardo Moraes (BRAZIL - Tags: SPORT OLYMPICS ENVIRONMENT) 

A toy doll is seen on Fundao beach in the Guanabara Bay in Rio de Janeiro March 13, 2014. According to the local media, the city of Rio de Janeiro continues to face criticism locally and abroad that the bodies of water it plans to use for competition in the 2016 Olympic Games are too polluted to host events. Untreated sewage and trash frequently find their way into the Atlantic waters of Copacabana Beach and Guanabara Bay - both future sites to events such as marathon swimming, sailing and triathlon events. REUTERS/Sergio Moraes (BRAZIL - Tags: ENVIRONMENT SPORT OLYMPICS) 

A view of Jacarepagua Lagoon, during a press tour in Rio de Janeiro, March 9, 2015. A press tour was organised by biologist Mario Moscatelli, to call attention to pollution on the waters of the lagoons which surround the Rio 2016 Olympic Park. REUTERS/Ricardo Moraes (BRAZIL - Tags: SPORT OLYMPICS ENVIRONMENT) 

A bird eats a fish surrounded by dead fish on the banks of the Guanabara Bay in Rio de Janeiro February 24, 2015. International Olympic Committee members meeting in Rio de Janeiro this week will understand if its waters are not completely clean for the sailing events in 2016, the state's governor said on Monday. REUTERS/Ricardo Moraes (BRAZIL - Tags: SPORT OLYMPICS ENVIRONMENT ANIMALS TPX IMAGES OF THE DAY) 

Garbage is seen near a fishing boat on Fundao beach in the Guanabara Bay in Rio de Janeiro March 13, 2014. According to the local media, the city of Rio de Janeiro continues to face criticism locally and abroad that the bodies of water it plans to use for competition in the 2016 Olympic Games are too polluted to host events. Untreated sewage and trash frequently find their way into the Atlantic waters of Copacabana Beach and Guanabara Bay - both future sites to events such as marathon swimming, sailing and triathlon events. REUTERS/Sergio Moraes (BRAZIL - Tags: ENVIRONMENT SPORT OLYMPICS) 

A pipe is seen near a fishing boat on Fundao beach in the Guanabara Bay in Rio de Janeiro March 13, 2014. According local media, the city of Rio de Janeiro continues to face criticism locally and abroad that the bodies of water it plans to use for competition in the 2016 Olympic Games are too polluted to host events. Untreated sewage and trash frequently find their way into the Atlantic waters of Copacabana Beach and Guanabara Bay - both future sites to events such as marathon swimming, sailing and triathlon events. REUTERS/Sergio Moraes (BRAZIL - Tags: ENVIRONMENT SPORT OLYMPICS)