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This article provides a sociological explanation for urban “greening,” the normative practice of using everyday signifiers of nature to fix problems with urbanism. Although greening is commonly understood as a reaction against the pathologies of the industrial metropolis, such explanations cannot account for greening’s recurrence across varied social and historical contexts. Through a study of greening in Germany’s Ruhr region, a polycentric urban region that has repeatedly greened in the absence of a traditional city, I argue that greening is made possible by a social imaginary of nature as an indirect or moral good, which I call urbanized nature, that is an outcome of, and subsequently becomes a variable in, urbanization. I draw on processual accounts of urbanization and the sociology of morality to explain urbanized nature’s emergence in the Ruhr at the beginning of the twentieth century, and its use to fulfill two competing visions of urban democracy in the postwar period. I find that rather than an ideological reaction against cities, greening is an aspirational practice that can be mobilized by a range of actors in a variety of places and times. By showing how a new social imaginary made new forms of moral action possible and how those ideals were then materialized in urban space, this article draws attention to the role of cultural imaginaries in urban change and to the material consequences of moral beliefs.

As urbanization progresses, open space becomes structured as units of progressively smaller sizes and with more pronounced physical and functional boundaries. This paper analyzes these Open Space Units (OSUs) in Flanders, and seeks how size of open space units, hence also spatial fragmentation, affects the evaluation of these units. The results clearly confirm a ‘fragmentation bias’, meaning a lower valuation of smaller units, which leads to a strategic gap and land use uncertainty concerning large stretches of area with high degree of fragmentation. This valuation is confronted with the contrasting and positive values expressed in a strategic open space project by local stakeholders about a typical peri-urban remnant open space unit. Overcoming the ‘fragmentation bias’ in open space valuation is a continuing challenge in planning and open space policies, especially in highly urbanized environments.

In India, there are religious practices intersecting with the process of urbanization at various levels. This paper looks at the practice of tree worship which continues to be a part of everyday life here. Specifically, it looks at how the Peepul tree (Ficus Religiosa) shrine with its serpent stones and the raised platform around it (katte) contributes to the territorial production of urban space in the city of Bangalore. Based on a study of 10 kattes in the city, it finds that these urban spaces belong either to a process of territorialization by the local community or its deterritorialization by the government. The paper builds a theoretical argument for how the katte as a ‘human activity node’ contributes to an ‘urban web’ which is categorized here as the physical layer. It finds that the Peepul tree could enable a ‘network of relations’, termed as the social layer. It suggests that the information fields generated within these layers influences collective memory of the people. Finally, the paper argues that the two layers acting together can help formulate an urban design model that can minimize deterritorialization.

In recent years, local activists in the Global North and South have been organizing to improve degraded and abandoned spaces in marginalized neighborhoods by creating parks, playgrounds, urban farms, or community gardens. This paper integrates existing knowledge on urban place attachment and sense of community with scholarship on environmental justice in order to understand the role of place attachment in environmental mobilization in distressed neighborhoods across political systems and urbanization contexts. It examines the different forms of connections that activists develop and express toward neighborhoods with long-time substandard environmental conditions and how their experience of the neighborhood shapes their engagement in environmental revitalization projects. This comparison of three neighborhoods in Barcelona, Boston, and Havana shows that activists in all three places intend for their environmental endeavors to express grief at the loss of community, fears of erasure, and emotional connection and feelings of responsibility to place. To address environmental trauma, they aim to construct nurturing, soothing, “safe havens,” recreate rootedness, and remake place for residents.

Problem, research strategy, and findings: Around the globe, streets and sidewalks in cities are being contested as spaces that should be used for more than transportation. This article challenges our understanding of both property rights and public space by applying a property rights framework to situate sidewalk use debates. It analyzes and maps the sidewalk property regimes of Ho Chi Minh City, Vietnam, through a novel integration of surveying and ethnography. The case illuminates the feasibility of a mixed-use sidewalk that can be shared between various kinds of uses and users. A mixed-use sidewalk that is both cooperative and livable is possible if planners incorporate time into planning space in order to expand the sidewalk's flexibility and if local society can renarrate and enforce new legitimacies on the sidewalk. Takeaway for practice: Sidewalk space deserves more attention as an important public space. In our era of historic urbanization, we should reconceive sidewalks as a mixed-use space rather than an exclusively pedestrian zone. Moreover, North American planners would benefit from engaging with public space experiments happening in cities in the developing world. Research support: This research was supported by MIT's School of Architecture and Planning, Department of Urban Studies and Planning, and the Undergraduate Research Opportunities Program.

This study investigates the degree to which community can be found in Dutch neighbourhoods and attempts to explain why there is more community in some neighbourhoods than in others. We apply a perspective on community which assumes that people create communities with the expectation to realize some important well-being goals. Conditions that account for the creation of a local community are specified, i.e. the opportunity, ease, and motivation to do so. These conditions are realized when (i) neighbourhoods have more meeting places; (ii) neighbours are, given their resources and interests, motivated to invest in local relationships; (iii) neighbours have few relations outside of the neighbourhood, and (iv) neighbours are mutually interdependent. Data from the Survey of Social Networks of the Dutch on 1,007 respondents in 168 neighbourhoods are used. Results show that there is a sizeable amount of community in Dutch neighbourhoods and that all the four conditions contribute to the explanation, while interdependencies among neighbours have the strongest impact on the creation of community.