To Have Urban Sustainability, Citizens Must Be Given a Nudge

The concept of urban sustainability is complex and multidimensional, and it cannot be reduced to simple improvements in energy performance or the adoption of more efficient technical solutions. Furthermore, also cities are complex and interconnected systems, and the sustainability of a city depends on different factors, including urban population growth, technological innovation, economic issues, the unpredictability of climate and socioeconomic changes. Despite the challenges, it is possible to improve urban sustainability through an integrated approach involving all actors, including citizens. Because the involvement of citizens in local decision-making processes contributes to creating a sense of belonging and responsibility towards the environment and society itself.