Urban Trends Research Articles

Relevance of population mobility for climate change mitigation

Population mobility and immobility are depicted prominently in the climate change adaptation literature either as maladaptation, or failure to adapt, or as a key strategy for adaptation in place or elsewhere. On the other hand, the relevance of population mobility in the context of climate change mitigation has not been highlighted to the same extent as, for example, population growth and fertility. And yet, as the outcomes of people moving around – sometimes in unexpected ways because of local combinations of policies, contexts and shocks – population mobility patterns, trends and levels could both facilitate and constrain climate change mitigation efforts. In this brief note, I suggest that climate change mitigation strategies and actions need to take into account their potential interactions with population mobility because it is a key component of population growth, population distribution and urbanisation trends, as well as a potential contributor to behavioural change.

Sustained Reductions of Bay Area CO2 Emissions 2018-2022.

Cities represent a significant and growing portion of global carbon dioxide (CO2) emissions. Quantifying urban emissions and trends over time is needed to evaluate the efficacy of policy targeting emission reductions as well as to understand more fundamental questions about the urban biosphere. A number of approaches have been proposed to measure, report, and verify (MRV) changes in urban CO2 emissions. Here we show that a modest capital cost, spatially dense network of sensors, the Berkeley Environmental Air Quality and CO2 Network (BEACO2N), in combination with Bayesian inversions, result in a synthesis of measured CO2 concentrations and meteorology to yield an improved estimate of CO2 emissions and provide a cost-effective and accurate assessment of CO2 emissions trends over time. We describe nearly 5 years of continuous CO2 observations (2018-2022) in a midsized urban region (the San Francisco Bay Area). These observed concentrations constrain a Bayesian inversion that indicates the interannual trend in urban CO2 emissions in the region has been a modest decrease at a rate of 1.8 ± 0.3%/year. We interpret this decrease as primarily due to passenger vehicle electrification, reducing on-road emissions at a rate of 2.6 ± 0.7%/year.

A comprehensive analysis and future projection of land use and land cover dynamics in a fast-growing city: A case study of Sekondi-Takoradi metropolis, Ghana

Sekondi-Takoradi is the most urbanized metropolis in the Western region of Ghana. Over the past two decades, it has experienced rapid shifts in both population density and land cover. Unfortunately, these transformations have significantly altered the natural landscape and expanded urban coverage. Previous studies have not established enough evidence on land use and land cover changes in the metropolis. For this reason, this study examined the existence, rate, and spatial distribution of land use and land cover as well as the future changes in land cover in the metropolis. Landsat imagery spanning from 1991, 2009, 2016, to 2023 provided the basis for evaluating the spatiotemporal dynamics of land use and cover within the metropolis. The Random Forest Classification algorithm was employed to categorize the images into three distinct classes: water, vegetation, and built-up areas. Analysis revealed a rapid growth in built-up areas by 63.08 km² (32.91 %), accompanied by a decrease in vegetation and water coverage by 60.99 km² (31.82 %) and 2.08 km² (1.09 %) respectively. This highlights the accelerating urbanization trend, emphasizing the critical need for vigilant monitoring and controlled urban expansion to mitigate potential adverse effects. Projections for 2030 indicate further changes with water areas decreasing to 1.21 km² (0.63 %), vegetation diminishing to 95.31 km² (49.73 %), and built-up areas expanding to 95.14 km² (49.64 %). This signifies a significant shift towards built-up areas, altering the metropolis' land cover composition and potentially impeding the achievement of Sustainable Development Goal 11. Understanding these changes in land use and land cover holds significant value for policymakers, enabling them to effectively monitor and safeguard natural resources.

Enhancing Agricultural Protection Areas Under Spatial Restrictions: A Case Study Of Majalengka Regency, Indonesia

The escalating trend of urbanization in Indonesia, accompanied by the conversion of agricultural land into urbanized areas, necessitates the implementation of zoning regulations. These regulations are crucial to protect agricultural land and safeguard the finite land assets of the country. To ensure the preservation of scarce land resources and guarantee food security, it is paramount for the Indonesian government to establish agricultural land protection areas. This paper presents an innovative approach and integrated methods to define agricultural land protection zones in spatial form. Results of studies landscape structure classification; core farmland accounts for 33.59% of the study region, whereas edge farmland accounts for 36.43%. Furthermore, the corridor farmland area is 0.30%, the discrete farming area is 12.26%, the Edge-Patch area is 3.54%, and the Perforated area is 13.89%. Geographically, the primary agricultural land is stretched out as a continuous area located on the outskirts of Majalengka city. By integrating Geographic Information Systems (GIS), remote sensing, landscape structure, prime farmland identification, and agricultural «land interest» could have a conservationist bent. It can mean protecting specific areas for environmental reasons (reach calculated), the study aims to create optimal farmland protection areas. The techniques outlined here can aid in determining PFPA from a geographical science standpoint, and the research’s findings will be helpful for PFPA planning.

Application of P-TOPALS for Smoothing Input Data for Population Projections ‘At the Edge’

Sparsely populated areas of developed countries are regions of great demographic diversity and dynamism. While they remain strategically and economically important, trends in urbanization and technology have increased their relative sparsity and isolation making centralized government, service delivery and planning a challenge. Populations of their sub-jurisdictions are small and often exhibit significant heterogeneity in key demographic characteristics, not least between their Indigenous first residents and non-Indigenous citizens. Development of projection models for these areas is challenged by significant input data paucity, biases and structural issues related to the data collection and estimation architectures in place to gather input data across diverse and small populations. While this is the case, the demand for and importance of projections is no less for sparsely populated areas than elsewhere. Variants of the cohort component model are important tools for population projections for SPAs, with their grounding in the demographic accounting equation and modest input requirements. Nevertheless, to attain fit-for-purpose input data requires demographers to consider and select from a growing number of methods for smoothing issues with input data for projections for these regions. In this article we analyze the contributions of recent advances in methods for estimating fertility, mortality, and migration rates for small and diverse populations such as those in SPAs, focusing on the very sparsely populated jurisdiction of the Northern Territory of Australia. In addition to the contributions of our method itself, results at the detailed level demonstrate how abnormal and challenging ‘doing’ projections for sparsely populated areas can be.

Chinese Migrants in Metropolitan Cities Abroad: Reconsidering Agency, Interactions, and Belonging

At the interface of Chinese diaspora studies, migration studies, and urban studies, this introduction argues for a shift towards city-based migration studies. The city is understood here not as a self-contained social cosmos, but as a globally and socially embedded urban level that opens up a more flexible perspective on the unfolding of migration processes at the micro, meso, and macro levels. It begins with a brief overview of recent trends in Chinese diaspora studies, global migration and urbanisation trends, and debates in critical geography on multi-scale urban theories. Then, it raises the question of the empirical feasibility of such an approach and argues for conceptualising migrants’ agency as a starting point for migration research, rather than pursuing a policy-driven, normative approach. Finally, it presents the five empirical contributions to this Special Issue. They are based on fieldwork in Paris, Berlin, Manchester (UK), Mexico City, Lagos, Gaborone, and Windhoek.

Roots to roofs: Farmers' perceived socio-ecological impacts of converting mango orchards to urban areas in Multan, Pakistan

The process of urban growth often results in the conversion of agricultural spaces, including orchards. In Pakistan, Multan - widely known as the city of Mangoes - has seen exponential urban growth in the past couple of decades, resulting in a huge loss of Mango orchards to urban settlements. This research focuses on investigating local farmers’ motivations for selling Mango orchards to urban colonies and their perceived implications of transforming mango orchards into residential areas in Multan, Pakistan. By surveying 100 participants, the study captures insights into urban expansion trends, primary motivations behind selling agricultural land, and the social, economic and environmental consequences of such conversions. Descriptive statistics and correlation analysis (heatmap) are used to dissect the farmers perceptions on the drivers and implications of Mango orchards' conversion to housing settlements in Multan, Pakistan. Notably, 96% of respondents highlighted that orchards nearer to urban centers were predominantly targeted for conversion. Furthermore, 57% believed less productive orchards were more frequently turned into urban developments. Our correlation analysis provided clarity on the economic dimensions. Participants who felt their orchard was not a profitable venture tended to see greater economic advantages from selling their orchards. Interestingly, individuals motivated by a desire to 'improve quality of life' generally observed an improvement in their living conditions post-sale. On the environmental spectrum, concerns such as potential future temperature rises were consistently associated with several selling motivations, indicating a broad awareness of environmental consequences. This comprehensive research highlight the interplay of economic, social, and environmental factors in orchard-to-housing conversions, presenting valuable knowledge for urban development strategists and decision-makers.

Urban Sustainability Development in Morocco, a Review

During the last decades, Morocco has recorded substantial urbanization and faced challenges related to urban sprawl and encroachment on fertile lands. This paper reviews several studies assessing urban sustainability development in 27 Moroccan urban areas using the UN’s Sustainable Development Goal (SDG) indicator 11.3.1, i.e., the ratio of Land Consumption Rate (LCR) to Population Growth Rate (PGR). Among the 27 urban areas reviewed, analysis of SDG 11.3.1 data revealed that only 7 exhibited trends towards sustainable urban development, while the remaining 20 showed a divergence from the sustainability objectives. We analyze the studies, conducted between 2020 and 2023, describing in depth the relationship between LCRs and PGRs, and provide a comprehensive summary of the SDG 11.3.1 outcome, discussing along the way methodological variations, and introducing a new concept for the evaluation of urban land consumption. The review reveals disparate regional urban development trends, emphasizing the need for local land tenure rules. Additionally, the study discusses how the SDG 11.3.1 reacts under the influence of several parameters such as land characteristics, climate, and geographic location. While the study acknowledges the limitations of SDG 11.3.1, it found that the indicator provides valuable insights into trends and comparisons, and should offer assistance to stakeholders, urban planners, and decision makers in their pursuit of sustainable development. However, these identified limitations underscore the need for a more comprehensive and multidimensional urban sustainability development indicator, capable of better addressing the complexities of the urban environment.

Research on the queuing theory in practical applications

In the face of mounting global urbanization and digitization trends, the need for advanced tools for city planners and system managers becomes increasingly paramount to ensure seamless infrastructure operations. Among the arsenal of available tools, queuing theory emerges as a standout, offering invaluable predictions and strategies for a broad spectrum of situations. This article delves into the nuanced applications of queuing theory, with a specific lens on network communications and urban space planning. Drawing from a rich tapestry of academic sources, the narrative weaves together core principles to shape models that mirror real-world situations. At the heart of this exploration lies a deep dive into solutions that tackle network delay challenges, fine-tuning techniques for 6TiSCH resource allocation, and the subtle art of queue design at railway ticket counters. These instances highlight the adaptability and immediate relevance of queuing theory across various sectors. Those in the fields of design, system architecture, and urban planning will find this read enlightening. By leveraging the insights offered, decision-makers can pave the way for optimized system functionalities and heightened user experiences, vital in an era dominated by urban sprawl and digital transformation.

Modern requirements for energy-efficient renovation of historical buildings

Мodern urban development trends includes the importance of taking historical buildings into account when implementing sustainable development strategies. Energetic modernization of historical buildings has both economic and social benefits. Buildings of historical importance often do not correspond to the requirements of modern directives, but the use of certain technical means and architectural practices allows to achieve a significant increase in energy potential. Energy-efficient renovation of historic buildings is an important component in the formation of future smart cities, since historic buildings themselves connect society with the heritage of the past and represent local and historical features of the city and its inhabitants. At the same time, the relevance of the problem is related to the insufficient systematization of data and information resources along with the constant development of tools for diagnosis and assessment of potential changes when working with historical buildings according to their characteristics. The main modern requirements for energy-efficient renovation of historical buildings, as well as the stages of analysis of the characteristics of historical buildings, and the further formation of the renovation strategy and the selection of appropriate methods and measures are considered. Considered limitations and features of the renovation of historic buildings (general engineering limitations due to the historical context, specific characteristics of a specific building, design limitations).

Research on the mechanism involved in urban social inclusiveness and resident entrepreneurship: Evidence from China

During the urbanization process in China, issues such as the widening wealth gap, class stratification, and social exclusion influenced residents' decisions to pursue entrepreneurship. Inclusiveness is an inevitable trend in new urbanization, and it is also a key factor in promoting residents' entrepreneurship and stimulating the potential for social innovation. Based on three key principles, “fairness, openness, and sharing, “ this paper assesses the relationship, and the internal mechanism driving the relationship, between urban social inclusiveness and resident entrepreneurship. This includes constructing an urban social inclusiveness index, and analyzing data from the 2018 China General Social Survey (CGSS). The key results indicate that urban social inclusiveness has a significant positive effect on resident entrepreneurship. The mechanism analysis shows that urban social inclusiveness can improve the probability of residents being entrepreneurial, by improving risk attitude, promoting class mobility, and expanding social networks. Heterogeneity analysis shows that urban social inclusiveness has a significant impact on the entrepreneurial of local residents, and low-class and high-class residents; urban social inclusiveness has no significant impact on the entrepreneurial choice of transient residents and middle-class residents. Besides, urban social inclusiveness plays a more significant role in promoting residents' choice of survival entrepreneurship, compared with opportunistic entrepreneurship.

Review of recent worldwide developments in urban wildlife ecology and preservation

The variety of plant and animal species that live around with the urban settings, such as cities and towns is referred to urban wildlife. Urban wildlife has to attention by urban planners and environmentalists, especially in light of the present worldwide trend of urbanization. This is crucial for creating human-habitable cities that also support the interaction of nature. The world's cities endure significant changes to their ecosystems and landscapes due to the extraordinary pace of urbanization. These advancements continue to have a huge influence on humans and animals living in urban areas. The current advances in urban wildlife ecology and preservation are analyzed and summarized in this study from a worldwide perspective. In an urban environment that is changing rapidly, it highlights the need for continual examination and monitoring to guide conservation efforts. In this review, we analyze peaceful urban ecosystems that sustain both human and animal populations, academics, environmentalists, and governments. This overview covers regulations associated with wildlife conservation and preservation in urban environments. Global advancements in urban wildlife ecology and protection are mostly driven by policy and legislation that influence conservation strategies and modify the urban environment to facilitate wildlife living together. Recognizing and protecting biodiversity in urban areas is becoming more important, as indicated by the assessment of recent global advancements in this field. The need to live in peace with animals becomes important as urban areas spread out and consume a growing portion of the natural world.

Advancing Urban Life: A Systematic Review of Emerging Technologies and Artificial Intelligence in Urban Design and Planning

The advancement of cutting-edge technologies significantly transforms urban lifestyles and is indispensable in sustainable urban design and planning. This systematic review focuses on the critical role of innovative technologies and digitalization, particularly artificial intelligence (AI), in urban planning through geo-design, aiming to enhance urban life. It begins with exploring the importance of AI and digital tools in revolutionizing contemporary urban planning practices. Through the methodology based on the Systematic Reviews and Meta-Analyses (PRISMA) protocol, this review sifts through relevant literature over the past two decades by categorizing artificial intelligence technologies based on their functionalities. These technologies are examined for their utility in urban planning, environmental modeling, and infrastructure development, highlighting how they contribute to creating smarter and more livable cities. For instance, machine learning techniques like supervised learning excel in forecasting urban trends, whereas artificial neural networks and deep learning are superior in pattern recognition and vital for environmental modeling. This analysis, which refers to the comprehensive evaluation conducted in this Systematic Review, encompasses studies based on diverse data inputs and domains of application, revealing a trend toward leveraging AI for predictive analytics, decision-making improvements, and the automation of complex geospatial tasks in urban areas. The paper also addresses the challenges encountered, including data privacy, ethical issues, and the demand for cross-disciplinary knowledge. The concluding remarks emphasize the transformative potential of innovative technologies and digitalization in urban planning, advocating for their role in fostering better urban life. It also identifies future research avenues and development opportunities. In light of our review findings, this study concludes that AI technologies indeed hold transformative promise for the field of geo-design and urban planning. They have proven instrumental in advancing predictive analytics, refining decision-making, and streamlining complex geospatial tasks. The AI’s capacity to process expansive datasets and improve urban planning accuracy has facilitated more sustainable urban development and enhanced the resilience of urban environments.

China’s safe and just space during 40 years of rapid urbanization and changing policies

ContextChina’s high-speed economic development was accompanied by rapid urbanization for forty years, guided by a series of changing policies enacted by the central government. However, did China become more sustainable both economically and environmentally? Or more specifically, did it operate within or towards a safe and just space (SJS)? Although numerous relevant studies exist, these questions have not been adequately addressed, and a multi-scale landscape perspective is needed.ObjectivesThe main objective of this study was to examine China’s urbanization trends, associated institutional changes, and their impacts on the nation’s sustainability trajectory during the past four decades. Specifically, we intended to analyze the impacts of urbanization and related policies on the spatial patterns, temporal trends, shortfalls, and complex nexus of the different dimensions of SJS across scales in China.MethodsWe apply the SJS framework, which integrates eight environmental ceilings and seven social justice foundations, to examine China’s urbanization, socioeconomic dynamics, and institutional changes, as well as their impacts on sustainability at multiple spatial scales. Segmented regression and correlation analysis were used to analyze the relationship of SJS with landscape urbanization and governance across China.ResultsSince the implementation of China’s Western Development Plan, China has faced increasing challenges of overshoots in CO2 emissions, phosphorus and nitrogen loading, ecological footprint, and material footprint on a per capita basis. However, our analysis showed that, by 2015, China met nearly all basic social justice needs. The pattern of SJS showed geospatial gradients of increasing social justice (except material footprint), multi-footprints, and CO2 from eastern to central, northeastern, and western regions, and from developed to developing provinces. The tradeoffs between social justice, environmental safety, and regional equality remain pronounced across heterogeneous landscapes with different levels of urbanization. The western region’s material footprint expanded enormously, but mainly for consumption in the eastern region of China.ConclusionsChina’s development in the past four decades is characterized by enormous economic growth, rapid urbanization, much improved living standards, highly fragmented landscapes, and increasing environmental problems. To promote sustainability, China should continue to implement the strategy of high-quality development and promote ecological civilization. Regional landscape-based approaches are needed to explicitly recognize geospatial heterogeneity and disparities, and better understand the urbanization-governance-landscape nexus for promoting a safer and more just China.

Perspectives for smooth bridging of dichotomized urban–rural land development in the peri‐urban areas of Ethiopia: Toward a continuum approach

The current trend of rapid urbanization in the global south is overwhelmed by an ever‐increasing demand for land. This indeed has been exerting an objectionable pressure over peri‐urban land located immediately outside of urban territories. This challenge is more severe in developing countries such as Ethiopia, where the urban and rural land systems are dichotomized and understood in isolation as two distinct entities. The need to broaden and understand perspectives for smooth bridging of urban and rural areas has been gaining more attention in the current discourse of viewing urban challenges and prospects. Hence, this study seeks to broaden perspectives for a smooth transition of urban development into rural areas and across peri‐urban areas in a continuity and guided by a continuum approach to development. A desk review research approach supplemented by key informant interviews was employed as a research method. The findings of this study show that the dichotomized land policy and governance systems, along with the multiplicity of actors or institutions having competing and conflicting interests in peri‐urban land have been hindering urban–rural development interconnectedness and continuity in Ethiopian cities. Moreover, a more nuanced perspective and understanding on the hindering factors for interconnectedness between urban and rural areas relevant for urban land use planning and policy‐making are presented in detail in this study. Concurrently, this study promotes the need for a more inclusive continuum approach to land development policy that responds equally to urban–rural contexts and across peri‐urban areas.

Urbanization Trends in Central Asian Countries: Aspects of Extensive and Intensive Agglomeration Growth

Urbanization Trends in Central Asian Countries: Aspects of Extensive and Intensive Agglomeration Growth

URBAN PLANNING APPROACHES TO PLANNING THE BEAUTIFICATION SYSTEM OF RESIDENTIAL AREAS DURING THEIR RECONSTRUCTION

The analysis of planning experience of inhabited localities urban beautification in view of reconstruction was undertaken in the article. The question of Ukrainian experience of urban beautification system in accordance with approved standards and State Constructional Standards was envisaged. Analysis of validation state of local documents in urban beautification field was carried out and it has shown deficient percentage of regulatory documents approval on local level, which is one of key issues of urban beautification development. Furthermore, detailed analysis of foreign experience of urban beautification planning and development trend of this system I such countries, as USA, Canada, France, Singapore, Hong Kong, Japan was carried out. It is shown that first and critical stage of planning of effective urban beautification is preparing and approving corresponding certificates and standards. Emphasis added to functioning normative legal documents on issues relating to urban beautification, in accordance to which the territory reconstruction in mentioned countries is realized. It was established that reference direction of urban beautification development in mentioned countries lies in parking lots removing out of the borders of curtilage or underground parking arrangement, landscape gardening development and classification of such territories by levels of urban gardening, territory reconstruction in accordance with typical schemes of street infrastructure development, urban gardening, cycle paths, etc. It is shown that problem solution of habitable open grounds organization on city level resides in usage intensification of such territories, and on the level of residential compounds – in increasing exploitation properties of open grounds. As a result of undertaken analysis it was established that raised problem of increasing the effectiveness of residential area usage within residential areas imposes complex approach, including question of land development intensiveness, architectural and planning organization and open grounds beautification.

Physical and socioeconomic driving forces of land use and land cover changes: the case of Hawassa City, Ethiopia

Background and objectives: Hawassa served as the country’s southern region’s capital from 1990 to 2019 and is currently experiencing rapid urbanization. Urban planners use the physical and socioeconomic driving elements of Land Use Land Cover Change (LULCC) to identify the variables influencing the trend of urbanization and then make appropriate plans.Methods: The study primarily employed advanced technologies like Geographic Information Systems and Remote Sensing to collect and analyze accurate and reliable information. The data were collected through questionnaires, interviews, and key interviews. Finally, the data were analyzed in different ways, using figures and tables, for example. Descriptive and econometric models were also used to analyze the data and probit regression models were used to investigate the impact of urban expansion on the livelihood of displaced farmers in the surrounding area.Findings: Multivariate analysis of variance indicated that the effect of urban expansion on the combined dependent variables, namely, on land use, socioeconomic activities, culture, and environmental change, is statistically significant F(8, 616) =12.704, p = 0.000, Wilk’s Lambda (λ) = .737, partial eta squared(partial η2) = 0.142, observed power = 1.000. Comparatively, the area covered by farmland, built-up areas, and bushland increased from 19.46% to 26.51%, 11.97% to 18.71%, and 3.07% to 4.51%, respectively. The mean score for the level of social relationship and values after land expropriation was 1.7 moderate, with a standard deviation of 0.852 in comparison with the mean score for the level of social relationship and values before land expropriation, which was 3.21 high, with a standard deviation of 0.79. This shows that the land expropriation program negatively affected farmers’ social relationships and values; their social relations levels were high before displacement and between low and moderate after displacement.Conclusion: Policy and strategy gaps in the urban expansion program and this policy issue have hindered the growth of the city and resulted in a serious issue regarding good governance in the area.

A Composite Index for Tracking the Evolution towards Energy Transition at Urban Scale: The Turin Case Study

Cities play a pivotal role in achieving worldwide carbon neutrality due to their significant contribution to global energy consumption and carbon emissions. Therefore, planning effective strategies and guiding evidence-based policymaking at the city scale becomes even more crucial. Composite indices serve as a valuable tool for monitoring urban energy transition trends. This paper aims to present a novel approach, robust and flexible even under conditions of data scarcity, for tracking the energy transition trend of a city by means of a composite index (UETI). The Turin case study is introduced to test the applicability of the proposed approach. Additionally, to demonstrate the robustness of the composite index framework, the paper includes the findings of correlation and sensitivity analyses. This study reveals a significant improvement in Turin’s environmental and energy domains, while the socio-economic domain shows more modest improvement. Furthermore, the study highlights the need to address the shortage of urban data to enhance the accuracy and reliability of metric-based frameworks and to extend the assessment to a larger sample of cities.

A Global Estimate of the Size and Location of Informal Settlements

Slums are a structural feature of urbanization, and shifting urbanization trends underline their significance for the cities of tomorrow. Despite their importance, data and knowledge on slums are very limited. In consideration of the current data landscape, it is not possible to answer one of the most essential questions: Where are slums located? The goal of this study is to provide a more nuanced understanding of the geography of slums and their growth trajectories. The methods rely on the combination of different datasets (city-level slum maps, world cities, global human settlements layer, Atlas of Informality). Slum data from city-level maps form the backbone of this research and are made compatible by differentiating between the municipal area, the urbanized area, and the area beyond. This study quantifies the location of slums in 30 cities, and our findings show that only half of all slums are located within the administrative borders of cities. Spatial growth has also shifted outwards. However, this phenomenon is very different in different regions of the world; the municipality captures less than half of all slums in Africa and the Middle East but almost two-thirds of all slums in cities of South Asia. These insights are used to estimate land requirements within the Sustainable Development Goals time frame. In 2015, almost one billion slum residents occupied a land area as large as twice the size of the country of Portugal. The estimated 380 million residents to be added up to 2030 will need land equivalent to the size of the country of Egypt. This land will be added to cities mainly outside their administrative borders. Insights are provided on how this land demand differs within cities and between world regions. Such novel insights are highly relevant to the policy actions needed to achieve Target 11.1 of the Sustainable Development Goals (“by 2030, ensure access for all to adequate, safe and affordable housing and basic services, and upgrade slums”) as interventions targeted at slums or informal settlements are strongly linked to political and administrative boundaries. More research is needed to draw attention to the urban expansion of cities and the role of slums and informal settlements.