Some US states consider a new way of generating clean energy: harvesting power from water flow in drinking water pipes. The city of Portland already took the step and installed a pipe system equipped with turbines generating energy to power street lights and buildings. This system only works in places where water flows naturally because of height difference. In this occasion it offers some advantages over typical solar or wind installations. First of all it’s not directly dependent on weather elements. Secondly the pipes are equipped with sensors to keep an eye on water quality and pressure. Water contamination or leaks can be detected much earlier, resulting in a smaller loss of water. Last but not least the installation doesn’t form any danger for water animals, a major problems with hydro power from dams – since there is no fish swimming around in the pipes.