URENIO Research is organizing a session at the 25th International Conference on Human-Computer Interaction (HCI International 2023) that will take place in Copenhagen, Denmark. The session is titled “Human, collective, and machine intelligence for the smart green transition of cities”. The smart and green transitions are major drivers of cities in the 21st century, and the session will focus on the adoption of digital technologies, such as automation and robotisation, sensor networks, IoT, cloud computing, analytics, big data, and AI, as well as innovations such as electric vehicles, decentralized energy systems, and green buildings.