Many cities' municipal governments have made some version of “sustainability” an explicit policy goal over the past two decades. Previous research has documented how the operationalisation and conceptualisation of sustainability in urban sustainability plans vary greatly among cities, particularly with respect to environmental justice. This article reports on whether and how large American cities incorporate environmental justice into their urban sustainability indicator projects. Our findings suggest that while there has been an increase in the number of cities incorporating environmental justice elements into sustainability plans since the early 2000s, their conceptualizations and implementations of sustainability remain highly constrained. The paucity of evaluative tools suggests that environmental justice efforts are potentially losing traction in public debate over macro-scale sustainability concerns (e.g. climate change) or the need for regionally competitive environmental amenities (e.g. parks). This paper concludes with suggestions for revising existing sustainability plans to better reflect environmental justice concerns.

Dooling [2009. Ecological gentrification: a research agenda exploring justice in the city. International Journal of Urban and Regional Research, 33 (3), 621–639] and Quastel [2009. Political ecologies of gentrification. Urban Geography, 30 (7), 694–725] reveal several ways in which urban sustainability efforts can produce gentrification, resulting in displacement and financial burden for the most vulnerable urban denizens. In the absence of adequate procedural justice measures, their studies suggest that long-time and vulnerable residents are negatively affected by urban sustainability efforts. However, some residents are able to remain in their neighbourhoods, and this study employs a resilience framework to explore what enables residents to resist displacement in three gentrifying neighbourhoods in New York City. Analysis of 42 interviews with residents in Manhattan and Brooklyn uncovers the multiple strategies residents use to adapt to an increasingly expensive urban environment. The case studies detailed in this paper highlight the multidimensional and context-specific nature of resilience, as well as the multiple scales at which resilience manifests. Gentrification, while reducing resilience at some scales, has not reduced resilience at all scales. Individual-level coping strategies emerge as an important characteristic of resilience during this period of gentrification. This study highlights the connections between scale and resilience and indicates how a better understanding of resilience can further contest the disruptive and socially unjust process of gentrification.

Infrastructure systems have direct implications for how health and well-being evolve across urban–rural systems. Scientists, practitioners, and policy-makers use domain-specific methods and tools to characterize sectors of infrastructure, but these approaches do not capture the cascading effects across interrelated infrastructure and governance domains. We argue that the development and management of sustainable urban infrastructure must focus on interactions across urban and rural places to advance equitable health and well-being. We call for a research agenda that focuses on urban–rural infrastructure systems, addressing trade-offs and synergies, decision-making, institutional arrangements, and effective co-production of knowledge across the diverse places connected by infrastructure.

Municipal leaders are pursuing ambitious goals to increase urban tree canopy (UTC), but there is little understanding of the pace and socioecological drivers of UTC change. We analyzed land cover change in Philadelphia, Pennsylvania (United States) from 1970–2010 to examine the impacts of post-industrial processes on UTC. We interpreted land cover classes using aerial imagery and assessed historical context using archival newspapers, agency reports, and local historical scholarship. There was a citywide UTC increase of +4.3 percentage points. Substantial UTC gains occurred in protected open spaces related to both purposeful planting and unintentional forest emergence due to lack of maintenance, with the latter phenomenon well-documented in other cities located in forested biomes. Compared to developed lands, UTC was more persistent in protected open spaces. Some neighborhoods experienced substantial UTC gains, including quasi-suburban areas and depopulated low-income communities; the latter also experienced decreasing building cover. We identified key processes that drove UTC increases, and which imposed legacies on current UTC patterns: urban renewal, urban greening initiatives, quasi-suburban developments, and (dis)investments in parks. Our study demonstrates the socioecological dynamism of intra-city land cover changes at multi-decadal time scales and the crucial role of local historical context in the interpretation of UTC change.

This article employs a social justice framing to examine youth perspectives of the smart city. We examine how youth understand the impact of digital technologies on urban transformations and whether their technology skills and digital literacy give them a sense of ownership over the future of their city. Research was conducted within the context of a six-week summer educational program involving seventy-nine youth of color from public high schools in Philadelphia, Pennsylvania. The program mixed digital skill building with urban fieldwork to prototype solutions to long-standing urban problems: the sort of problems that smart city policies also seek to change. Our research points to a conundrum for youth. Although they embraced technological innovations, they indicated that digital technologies failed to serve the public or address pressing concerns they identified as problematic within the city: crime, drugs, and homelessness. Instead, in their view, digital technologies delivered the most benefit to private spaces in the home and workplace. Furthermore, the youth did not envision that emergent technologies would improve their neighborhoods or communities but only their employment prospects. This research suggests that the emergent smart city is reproducing actual as well as perceived urban inequities: Wealthy residential neighborhoods and spaces of the new economy become “smart,” but much of the city remains left behind. These patterns create a paradox for youth who invest in digital skills while remaining on the margins of technology-driven, smart urban change. Key Words: digital divide, Philadelphia, smart city, social justice, youth.