“Green Nexus Hub”: towards a design paradigm for ecosystem-based urban risk management

The contribution addresses urban risk as a systemic condition and introduces the “Green Nexus Hub” as a design paradigm for the ecosystemic regeneration of residual spaces. Through design practices and methodologies, these sites are reinterpreted as socio-ecological infrastructures capable of reactivating latent ecosystem services and fostering inclusive processes. The research integrates a critical review of the literature with the analysis of three case studies—Marseille (France), Bogotá (Colombia), and East Naples (Italy)—selected to highlight recurrent tensions and potentialities. The findings outline an operational framework for urban strategies oriented toward transformative resilience, ecological justice, and design innovation.