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Urban landslides are increasing globally, mainly caused by human-induced changes in hillsides. Most of these events have caused low-intensity damages to housing and infrastructure. A total of 2038 locations of landslides in the hydrological year of 2010 were used to model landslides' occurrence in the metropolitan region of São Paulo—Brazil—using a social–ecological–technological system's approach, which enables the analysis of urban landslides as the outcome of dynamic socioeconomic and infrastructural conditions alongside climatic and geophysical conditions. A multi-step model approach was used to select the best set of variables related to landslides' occurrence and assess their importance. The value of AUC of the model was 0.9087, denoting the high level of discrimination achieved. Antecedent rainfall played the most important role, followed by terrain slope. Informal settlements, associated with poor constructive practices and a lack of municipal inspection on civil works and buildings, as well as the number of households, which stands for built density and greater alteration in hillsides, yielded a slightly lower contribution. Other variables showed a marginal contribution. These results reinforce the role of local ordinances aimed at restricting occupation in steeper slopes and public policies to promote adequate housing and constructive practices. Future climate projections to MRSP point to the increase in intense rainfall days, making disasters caused by landslides a major source of risk. [ABSTRACT FROM AUTHOR]

In recent years, the water–energy–food (WEF) nexus approach has been widely used as a framework in the context of urban Sustainability. However, some elements of the approach are normative, leading to a technical view of resources and technocratic policy implementation. To avoid such tendencies, this study uses the framework of 'nexus of humility'. We used insights from the Science and Technology Studies to better assess the interactions between water, energy, and food, and consider the social construction aspects of the nexus itself. The approach of Pathways to Sustainability is combined with this framework to analyze two government programs in the cities of São Paulo and Guarulhos, Brazil; namely, the Green and Healthy Environments Program and the Environmental Health Program, respectively. We interviewed 20 individuals linked to these policies and analyzed narratives inductively and deductively. The results showed six groups of narratives, namely: environmental and social determinants of health, health prevention and promotion, intersectorality, politics and economy, territory, learning, and participation. Moreover, we concluded that narratives related to the WEF nexus, even if not explicitly part of the government guidelines, are present within the existing axes of action. Public health was understood as an important support pillar for the development of synergies related to Sustainability in urban areas. Finally, we sought to contribute to the literature by showing how this new framework can 'open up' avenues for sustainability within the contexts of high urban vulnerability and social inequality. [ABSTRACT FROM AUTHOR]

Santos and São Vicente Estuarine Complex (SSEC) is a densely populated coastal area that houses the main port in Latin America and the most prominent Brazilian industrial complex. Irregular occupations in preservation areas result in a disorderly increase in population, with negative social and environmental impacts. We evaluated the average annual growth of 74 slums occurring in this area and variations in water quality from 2005 to 2018. We monitor the growth of the occupied areas and estimate their respective populations. The average annual population growth was over 6% per year (p.a.). Invasions of new areas and verticalisation of already occupied areas represent 85% of the growth seen. The monthly polluting loads exceeded 450 tonnes or 2,086,000 m3, compromising the waters and local and regional public health. We strongly recommend re-urbanising the area using the resource savings caused by water loss to reduce the risks of ecosystem degradation, damage to health and disease spread. [ABSTRACT FROM AUTHOR]