TwinAIR embraces bleeding edge innovation in urban sensing (chemical and environmental sensors), data analytics and visualisation (digital maps and real-time video analysis), smart buildings (digital twins and virtual sensors) and behavioural insights (citizen participation, gamification) to deliver a nascent solution. It is implemented across six diverse pilot sites in Europe (ES, IE, UK, SE, DE, EL) with demonstrations covering residential dwellings, public administration buildings, hospitals and schools, along with selected types of vehicles (buses, vans).