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)