TOPSHOTS In this photograph taken on April 13, 2014, scavengers on boats salvage plastic waste for recycling on the Citarum river choked with garbage in Cihampelas district in West Java province. This immense aquatic rubbish bin winds 297 kilometres (185 miles) across the island of Java, cutting through the sprawling Indonesian capital Jakarta. Labelled "the most-polluted in the world" by a local commission of government agencies and NGOs charged with its clean-up, the river is the only source of water for 15 million Indonesians who live on its banks, despite the risks to health and crops. AFP PHOTO / TIMUR MATAHARI