If you think the rivers are polluted in UK you might be shocked by this picture. The river Citarum in West Java seems to be more rubbish than river. The river that provides the main source of drinking water for cities such as Jakarta is polluted with rotting rubbish from the homes and factories surrounding it. In fact the river is so polluted there are fears that the hydropower stations in the area may start corroding. Not only that, pollution here is likely to double by 2025.