Unchecked Pollution Befouling Majestic Lake Titicaca BAHIA DE COHANA, Bolivia — Jun 25, 2015, 11:52 AM ET By CARLOS VALDEZ Associated Press Gulls swept down to feast on hundreds of dead and dying giant frogs floating in the rancid waters along a southeastern shore of Lake Titicaca, where the algae-choked shallows reek of rotten eggs….