Soil loss and peri-urban settlement expansion are key issues in urban sustainability, with multi-disciplinary implications that go beyond individual ecological and socioeconomic dimensions. Our study illustrates an assessment framework diachronically evaluating urbanization-driven soil quality loss in a Southern European metropolitan region (Athens, Greece). We tested the assumption that urban growth is a process consuming high-quality soils in a selective way analyzing two spatial layers, a map illustrating the diachronic expansion of settlements at five time points (1948, 1975, 1990, 2000, and 2018), and a geo-database reporting basic soil properties. The empirical results showed that the urban expansion in the Athens region took place by consuming higher- quality soil in fertile, mostly flat, districts. It entailed a persistent soil quality decrease over time. This trend globally accelerated in recent years, but in a heterogeneous way. Actually, newly built, more compact areas expanded on soils with lower erosion risk than in the past. Besides, low-density land take is likely to be observed in soils with moderate-high or very-high qualities. These evidences reflect the need for a comprehensive evaluation of complex processes of land take informing spatial planning for metropolitan sustainability.

Self-constructed cities refer to impoverished neighborhoods that suffer from inadequate housing. Such cities are the result of individual or communal initiatives that must self-construct their neighborhoods. Most of the self-constructed cities are located near endangered bioregions on the Earth, and their continued growth will inevitably aggravate the human impact on our planet. Dwellers in these areas tackle threats such as poverty, environmental degradation, and disaster vulnerability. The lack of knowledge in planning self-constructed cities causes conditions of injustice. However, appropriate management of the existing natural capital of the surrounding areas of such cities can address the mentioned challenges and the conditions for justice. This paper aims to evaluate the role of Nature-Based Solutions (NBS) in planning procedures, to create conditions of fairness and equity in self-constructed cities. The paper focused on the linkage between the application of NBS and four principles of justice: distributive justice, restorative justice, spatial justice, and interactional justice. Considering data from a review of the literature, scrutiny of past planning and policy measures and a field study with interviews with stakeholders, the empirical result of our study delineates important strategic implications of Nature-Based Solutions for sustainable planning in the case study of San José de Chamanga, Ecuador. It was demonstrated how small-scale, natural-based interventions, instead of broader actions based on a pure engineering perspective, are economically and ecologically profitable, with a positive impact on local communities’ well-being and social cohesion.

This article focuses on the complex relationships between energy processes and ecosystem services. It highlights the conflicts between them due to the anthropocentric value that characterizes their interrelationship. The article reports the initial results of ongoing research on energy decentralization processes in Italy, examining the Italian districts heating performance, concerning ecosystem provisioning and regulating services. The analysis is based on a sample of more than 150 Italian district-heating systems. Contrary to studies that positively evaluate processes of energy decentralization, the results of the research show some critical factors and impacts. An efficiency gap between districts heating and traditional energy systems emerged. The data processed show a critical situation in the development of local networks, highlighting that the decentralized energy model is not deeply rooted in the local area and is poorly characterized by shared governance, which instead would benefit from the integration of ecosystem services. The significant presence of large energy groups and the considerable use of fossil sources in Italy reduces the effectiveness of the decentralization of energy systems. The article presents some conclusive considerations, which outline some general guidelines for proceeding towards a more correct relationship with ecosystem services and greater integration with the territories.

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