How do we build a circular city? Ellen MacArthur Foundation's Government & Cities Programme Lead, Ashima Sukhdev, says governments have a big role to play. More than just regulations - city governments can encourage innovations, invest in sustainable initiatives and convene multiple players to work together. “There are ways you can change the built environment; you can change the way that people are using products and materials in their cities; you can change the way people are moving around cities to manage resources more effectively,” she said. London, for one, is a model in applying the circular economy in the urban context. From Circularity19.