At TU Delft, sustainability is present in every area: education, research and valorisation. In addition, TU Delft is collaborating with Leiden University and Erasmus University Rotterdam in the Centre of Sustainability. The mission of this centre is to accelerate the transition to a circular economy in order to achieve a sustainable society. Adding more and better value to waste, reducing waste and closing material cycles is an important part of this transition. Both science and practical examples show that there are exciting opportunities to look beyond thinking in terms of waste.