Topic Review
Causalities of Upscaled Urban Aquaponics
Aquaponics, the water-reusing production of fish and crops, is taken as an example to investigate the consequences of upscaling a nature-based solution in a circular city. We developed an upscaled-aquaponic scenario for the German metropolis of Berlin, analysed the impacts, and studied the system dynamics. To meet the annual fish, tomato, and lettuce demand of Berlin’s 3.77 million residents would require approximately 370 aquaponic facilities covering a total area of 224 hectares and the use of different combinations of fish and crops: catfish/tomato (56%), catfish/lettuce (13%), and tilapia/tomato (31%). As a predominant effect, in terms of water, aquaponic production would save about 2.0 million m3 of water compared to the baseline. On the supply-side, we identified significant causal link chains concerning the Food-Water-Energy nexus at the aquaponic facility level as well as causal relations of a production relocation to Berlin. On the demand-side, a ‘freshwater pescatarian diet’ is discussed. The new and comprehensive findings at different system levels require further investigations on this topic. Upscaled aquaponics can produce a relevant contribution to Berlin’s sustainability and to implement it, research is needed to find suitable sites for local aquaponics in Berlin, possibly inside buildings, on urban roofscape, or in peri-urban areas. 
  • 572
  • 10 Aug 2021
Topic Review
Peer Effects in Housing Size in Rural China
In recent decades, rural China has witnessed a housing construction boom. In order to control the rapid growth of rural housing, both central and local governments have established quantitative restrictions on the floor numbers and total housing area; however, these have been relatively ineffective. Current research to explain this rapid growth in rural housing tends to consider independent household behavior, while social interactions among villagers are neglected.
  • 567
  • 10 Feb 2022
Topic Review
Morphological Transformation of Urban Open Spaces
Ongoing urbanization has led to the continuous expansion of built-up areas; as a result, open space is under great threat. Despite the wealth of studies conducted on open spaces, there is still a further need to further investigate the morphology of open space, particularly in an effort to understand the trends and drivers of open space morphological transformation that remain under-researched.
  • 562
  • 16 Sep 2022
Topic Review
Ground Beetle Communities and Urbanization
Urbanization involves the profound alteration of original habitats and causes habitat loss and biodiversity decline. Urban areas and roads in land use mainly have a negative influence on ground beetles. Paddies, fields, parks and green spaces, and open space were positively correlated with species richness of forest species and large-sized species, and open space was positively correlated with species richness and the density of open land species. However, ground beetle communities in different areas of varying sizes did not group separately. These results suggest that changes in paddies, fields, parks and green spaces, forests, and open space associated with the expanding urban area and road greatly influenced species composition, and the community structure remained similar. 
  • 547
  • 10 Jul 2021
Topic Review Peer Reviewed
Social Aspects of Smart Urban Mobility
There is a growing interest in sustainable urban transport solutions in cities around the world. These changes, known as “smart urban mobility”, aim to reduce the negative effects of transport on the natural environment and enhance the standard of living for urban dwellers. It should be noted that in addition to this transformation’s technological aspects, modifying the city’s structure and architecture also has a social dimension. The transformation of urban mobility has a significant impact on social relations. Introducing new modes of transport, such as city bikes and electric scooters, creates new ways of moving around the city and can impact social interactions. This can increase social integration and a community’s sense of belonging. At the same time, it is necessary to consider the differences between social groups to ensure equal access to the benefits of these changes in addition to deeper social elements, such as changing the habits and expectations of residents and adapting solutions to the specific needs of each city. This paper aims to look at the social aspects of smart urban mobility, including the impact of these changes on the lives and relationships of city residents.
  • 532
  • 22 May 2024
Topic Review
NEET Rural–Urban Ecosystems
The European Union (EU) typically supports young people aged between 15–24 years who are not in employment, education, or training (NEETs) via policies that target the following interconnected areas at the individual member state level: employment; education; social work; and youth engagement. In the context of employment, each country must develop an aligned European employment strategy coordinated with the other member states, which should contribute to the management of common policies and the involvement of local governments, trade unions, and employers’ organisations. 
  • 517
  • 29 Nov 2021
Topic Review
Walking Needs and COVID-19
More than 150 cities around the world have expanded emergency cycling and walking infrastructure to increase their resilience in the face of the COVID 19 pandemic. This tendency toward walking has led it to becoming the predominant daily mode of transport that also contributes to significant changes in the relationships between the hierarchy of walking needs and walking behaviour. These changes need to be addressed in order to increase the resilience of walking environments in the face of such a pandemic.
  • 515
  • 26 Jul 2021
Topic Review
Appraising Agroecological Urbanism
By the mid-century, urban areas are expected to house two-thirds of the world’s population of approximately 10 billion people. The key challenge will be to provide food for all with fewer farmers in rural areas and limited options for expanding cultivated fields in urban areas, with sustainable soil management being a fundamental criterion for achieving sustainability goals.
  • 512
  • 24 Jan 2022
Topic Review
Spread of Viruses on Universities Campuses
Outdoor open spaces are important for sustainable universities because they accommodate outdoor activities and enhance the campus’s livability and vitality. The character of the outdoor space determines the quality of the campus.
  • 498
  • 07 Jun 2022
Topic Review
Urban Community Elderly Care Facility
How to deal with the aging population has become an essential issue for the whole world. With the development of the economy and technology, human beings are no longer satisfied with the increase in life expectancy; they are instead pursuing a high quality of life (QOL). Studies have shown that the elderly in centralized nursing facilities suffer from depression, high mortality rates, and low QOL. “Aging in place” is proposed to help the elderly age better. It refers to extending residence time and satisfying the preference of the elderly to age in a familiar environment, supported by the external environment of the community. As an essential link to ensure aging in place, community elderly care facilities (CECFs) have been studied in terms of facility functional setting and service supply, facility spatial distribution and accessibility, and facility service and financial security.
  • 495
  • 26 Aug 2022
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