Spatial allocation of nature-based solutions in the form of public green infrastructure in relation to the socio-economic district profile–a GIS-based comparative study of Gdańsk and Rome

With increasing environmental and climate change threats to urban areas, Nature-based Solutions (NbS), including public greenery, are becoming integral components of green infrastructure (GI) networks. These solutions provide multiple benefits in different aspects, including stormwater management, enhanced air quality and improved societal well-being, offering cost-effective and adaptable alternatives to resource-intensive and environmentally harmful grey infrastructure. However, their benefits are often unevenly distributed, resulting in patterns of environmental injustice. This article presents a GIS-based study of the spatial allocation of publicly accessible NbS (PNbS), in Gdansk, Poland, and Rome, Italy. It aims at assessing possible correlations between the socio-economic attributes of the urban districts of the two cities and the density of available PNbS in each district. Results indicate disparities in density of PNbS across different socio-economic layers, more relevant in Rome than in Gdansk, and highlight the importance of informed urban planning. The study supports concerns for fair NbS distribution, pointing to the potential exacerbation of social and economic inequalities, which puts socially vulnerable communities at higher risk of being affected by climate hazards. The results provide insights for policymakers, urging a prioritized focus on districts with crucial PNbS needs. Strategies should consider socio-economic factors to address distributive and environmental justice concerns. Overall, the study offers insights to guide urban planning toward climate-resilient and inclusive cities. • Density of public nature-based solutions and Socio-economic status are correlated. • Higher population links with lower public nature-based solutions density. • Uneven distribution of public nature-based solutions is more evident in Rome. • A socio-economic priority index is proposed as an auxiliary decision-making tool.