As Head of Urban Policy Guidelines and Chief Innovation Officer at the city of Dortmund, Jan Fritz Rettberg summarizes his great interest and passion in one term: Smart Cities. To make Dortmund more sustainable, Jan and his team created “Innovation Next Door” together with citizens. The focus? Innovative ideas around urban resilience, low emissions, intelligent mobility solutions, and smart power systems, invented not only by one person alone but by a collective of visionaries.