Sailors in the upcoming Olympics in Rio de Janeiro will face more than just tough competition. They will be sailing in Guanabara Bay, a body of water thoroughly befouled with garbage and sewage.  Falling overboard is not recommended.  As reported by the New York Times: “It can get really disgusting, with dog carcasses in some places and the water turning brown from sewage contamination,” said Thomas Low-Beer, 24, a Brazilian Olympic hopeful who sails in the bay. He shuddered when recalling how his dinghy crashed into what he believed was a partly submerged sofa, capsizing him into the murky Guanabara.