The CityLoops project brings together seven European cities – Apeldoorn, Bodø, Mikkeli, Porto, Seville, Høje-Taastrup and Roskilde - to pilot a series of demonstration actions to close the loop of two of the most important waste streams in Europe: Construction and Demolition Waste, and Bio-waste. Their ultimate aim is to become circular cities in which no resource goes to waste, driving the transition to the circular economy.