Urbanization
Urbanization
Urbanization is one of the defining demographic, economic, environmental, and social transformations of the modern world. A growing share of humanity lives in cities and towns, while expanding metropolitan regions increasingly concentrate population, employment, infrastructure, political power, consumption, and environmental impacts.
The growth of cities can generate substantial benefits. Dense urban areas can bring workers and businesses closer together, improve access to education and services, encourage specialization and innovation, and make some forms of infrastructure more efficient. Cities have therefore played a central role in economic development across much of the world.
Urbanization can also create serious problems when population and land development grow faster than housing, transportation, water, sanitation, public services, and effective governance. Rapid urban expansion can produce informal settlements, rising housing costs, congestion, pollution, ecological degradation, inequality, and greater exposure to climate hazards.
The consequences of urbanization therefore depend not simply on whether cities grow, but on how they grow, where development occurs, how infrastructure is financed, and whether urban institutions can distribute the benefits and costs of city life equitably.
Global Urbanization and Demographic Change
The worldwide movement toward urban living represents a historic change in human settlement. Urban growth is occurring not only in megacities but also in smaller and intermediate-sized cities, many of which may absorb a large share of future population increases.
Urbanization interacts with migration, natural population growth, changing administrative boundaries, aging populations, economic development, and the transformation of formerly rural settlements into urban communities. These processes make urbanization considerably more complex than a simple movement of people from villages to large cities.
Different parts of the world are also urbanizing at very different rates. Many wealthy countries already have highly urbanized populations and increasingly face challenges such as aging, suburbanization, infrastructure renewal, and population decline in some cities. Much of the fastest future urban population growth, by contrast, is expected in Africa and Asia.
The scale of future urban growth will place enormous demands on housing, transportation, energy, water systems, sanitation, public space, schools, health services, and municipal government. Decisions made during periods of rapid expansion can influence urban development patterns for generations.
Urban Form, Sprawl, Density, and Infrastructure
Urbanization changes both population distribution and the physical landscape. Cities can grow outward through the conversion of agricultural or natural land, upward through taller buildings, or through combinations of expansion and increasing density.
Outward growth can provide space for new housing and economic activity, but poorly planned sprawl can increase transportation distances, infrastructure costs, automobile dependence, energy consumption, and the destruction or fragmentation of natural habitat. Water, sewer, road, and transit networks become more expensive to provide when development is widely dispersed.
Research increasingly distinguishes between population growth and land consumption. A city's physical footprint can expand much faster than its population, producing lower-density development and increasing the amount of land required for each resident.
Geography also shapes urban form. Mountains, rivers, coastlines, and other natural barriers can limit outward expansion and encourage greater density or vertical development. At the same time, these constraints can complicate transportation systems and increase pressure on scarce developable land.
Compact development, mixed land use, transportation connectivity, and transit-oriented development are frequently proposed as ways to accommodate urban growth while limiting sprawl. Streets, public transportation, cycling networks, pedestrian infrastructure, and public spaces influence not only mobility but also economic opportunity and social interaction.
The effectiveness of these approaches depends heavily on planning, financing, and governance. Metropolitan regions commonly extend across multiple municipal boundaries, making coordination of transportation, housing, land use, infrastructure, and environmental policy increasingly important.
Regional Patterns of Urbanization
Urbanization is a global process, but its causes and consequences vary substantially between regions.
Africa is experiencing some of the world's most rapid urban growth. Major projections suggest that the continent's urban population could rise from roughly 700 million people to about 1.4 billion by 2050. Thousands of cities and smaller urban settlements are expanding, creating both enormous development opportunities and major infrastructure challenges.
African cities often provide higher wages, educational opportunities, service access, and economic productivity than surrounding rural areas. Yet many have struggled to obtain the full benefits normally associated with urban concentration because transportation, land markets, infrastructure, housing, and government institutions have not kept pace with population growth.
Nairobi illustrates many of these pressures. Rapid growth has created opportunities for employment and investment while increasing demands for transportation, housing, water, sanitation, land management, climate resilience, and informal-settlement upgrading.
Asian urbanization includes some of the largest urban transformations in history. China has experienced massive rural-to-urban migration and metropolitan expansion, while India continues to experience rapid growth in major cities, secondary cities, urban peripheries, and settlements that are becoming increasingly urban despite retaining rural administrative classifications.
Asian cities face major challenges involving congestion, housing shortages, land conversion, environmental degradation, heat, flooding, air pollution, and infrastructure finance. At the same time, their enormous scale creates opportunities for more efficient transportation, energy systems, housing, and economic concentration.
Latin America and the Caribbean are already highly urbanized, but cities continue to change through densification, outward expansion, redevelopment, and metropolitan integration. Housing affordability, informal settlements, transportation, governance across municipal boundaries, climate migration, and resilient infrastructure remain important concerns.
Bogotá provides one example of efforts to combine housing, public transportation, cycling, green construction, climate resilience, and social inclusion within a large metropolitan region.
Housing, Informal Settlements, and Urban Inequality
Housing is among the most persistent challenges associated with rapid urbanization. When formal housing construction cannot keep pace with population growth, residents frequently turn to informal settlements, unauthorized subdivisions, overcrowded housing, or development on environmentally vulnerable land.
High land prices, construction costs, limited financing, restrictive regulations, weak infrastructure systems, and inadequate public investment can all contribute to housing shortages.
Informal settlements should not be understood simply as temporary abnormalities within cities. In many rapidly growing metropolitan regions they accommodate substantial shares of the population and workforce. Their residents may nevertheless have limited access to secure land tenure, safe water, sanitation, drainage, transportation, electricity, and other public services.
Programs in cities such as Nairobi and Dar es Salaam demonstrate the difficulty of improving informal settlements at metropolitan scale. Upgrading requires not only construction but also financing, land policy, infrastructure, community participation, and coordination among multiple levels of government.
Urban inequality frequently has a strong spatial dimension. Wealthy and poor residents may live within the same metropolitan region while experiencing dramatically different access to employment, schools, transportation, parks, health care, environmental quality, and infrastructure.
Johannesburg demonstrates how historical patterns of segregation can continue shaping access to opportunity long after discriminatory laws have been abolished. Similar patterns of spatial inequality appear in many cities where housing markets, infrastructure investment, and transportation networks separate residents by income or social status.
Informal workers are also central to urban economies, particularly in the Global South. Policies that ignore street vendors, domestic workers, waste pickers, small-scale producers, transport workers, and other informal employment can exclude a large part of the population from city planning and economic policy.
Urban Health and Social Conditions
Cities can improve health by concentrating hospitals, education, sanitation, transportation, employment, and other services. They can also concentrate environmental and social hazards.
Urban health is shaped by housing conditions, air pollution, transportation systems, sanitation, water quality, traffic injuries, infectious disease, chronic disease, violence, physical activity, green space, and access to medical care.
Average urban health statistics can conceal extreme inequalities between neighborhoods. Poor residents may face greater exposure to pollution, unsafe housing, heat, flooding, traffic hazards, contaminated water, and inadequate sanitation while having fewer resources to protect themselves.
Children are particularly affected by the design and management of urban environments. Safe transportation, public space, clean air, secure housing, schools, recreation, and access to services can strongly influence childhood development and long-term health.
Urban planning is therefore increasingly viewed as a form of public-health policy. Decisions about housing density, street design, transportation, green space, water systems, and land use can influence health outcomes for decades.
Climate Change, Heat, Flooding, and Urban Resilience
Urbanization and climate change increasingly interact.
Buildings, pavement, reduced vegetation, and human-generated heat can make cities substantially warmer than surrounding areas. The urban heat-island effect can combine with global warming to increase exposure to dangerous daytime and nighttime temperatures.
Research across hundreds and thousands of cities shows that urbanization can intensify heat exposure and contribute to compound heatwaves. Poor neighborhoods can face especially severe conditions when they have fewer trees, more pavement, inadequate ventilation, lower-quality housing, and limited access to cooling.
Urban expansion can also increase flooding. Replacing vegetation and permeable soil with roofs, roads, parking areas, and other hard surfaces reduces infiltration and increases runoff. Buildings, streets, drainage networks, and other elements of urban form then influence how floodwaters move through cities.
Extreme precipitation, inadequate drainage, river systems, climate change, and rapid development can combine to produce severe urban flood hazards. Studies of events such as Hurricane Harvey and flooding in East Africa illustrate how urban development can amplify natural hazards.
Cities are responding through a range of adaptation measures, including urban trees, restored waterways, permeable surfaces, parks, green roofs, reflective materials, improved drainage, flood management, and redesigned public spaces.
Climate resilience is also an infrastructure challenge. Rapidly urbanizing countries will require enormous investments in transportation, housing, water, sanitation, drainage, energy systems, and other infrastructure if growing cities are to withstand future climate conditions.
Urban Ecology, Biodiversity, and Food Systems
Urbanization represents a major form of land-use change.
Expanding cities can replace forests, wetlands, grasslands, agricultural land, and other ecosystems. Habitat loss and fragmentation may affect biodiversity far beyond the land directly covered by buildings and roads.
Urban environments also create new ecological conditions. Some plants and animals adapt successfully to cities, while others decline or disappear. Urbanization therefore changes the composition of ecological communities rather than simply eliminating nature altogether.
Research across cities on multiple continents shows that urban development tends to favor some biological traits while disadvantaging others. Vegetation, climate, city structure, and surrounding landscapes all influence which species persist.
Urban green space can provide multiple benefits. Trees, parks, wetlands, restored waterways, green roofs, and other nature-based infrastructure can reduce heat, absorb stormwater, improve air quality, provide habitat, support recreation, and improve quality of life.
Access to urban nature, however, is often unequal. Differences in tree cover and green space can reinforce broader inequalities in environmental quality and heat exposure.
Urbanization also transforms food systems. As populations concentrate in cities, food must move through increasingly complex networks linking farms, processors, markets, transportation systems, retailers, and consumers.
Urban growth can convert agricultural land while simultaneously increasing demand for food. Research on city-region food systems therefore emphasizes the importance of maintaining economic and ecological connections between metropolitan areas and surrounding rural regions.
Approximately 1.7 billion people in urban and peri-urban areas have been reported as experiencing food insecurity, demonstrating that hunger and nutritional vulnerability are not exclusively rural problems.
Transportation, Energy, Governance, and the Urban Economy
Cities are major centers of economic activity because they bring together workers, firms, infrastructure, markets, educational institutions, and specialized services.
This concentration can increase productivity and innovation, but the benefits of agglomeration depend on whether residents can actually reach jobs and services.
Transportation is therefore fundamental to urban opportunity. Rapid motorization and automobile-oriented development can increase congestion, traffic deaths, pollution, and transportation costs while making employment less accessible to people without cars.
Public transportation, walking, cycling, safer street design, and transit-oriented development can improve mobility while reducing dependence on private automobiles.
Energy demand also rises as cities expand. Electricity, heating and cooling, transportation, buildings, industry, and cooking systems all contribute to urban energy consumption. Expanding renewable energy, improving efficiency, and providing universal access to reliable energy are therefore major components of sustainable urban development.
Governance may ultimately determine whether urbanization produces broad prosperity or deepening inequality.
Municipal governments must coordinate land use, transportation, housing, infrastructure, environmental protection, economic development, and public services while often operating with limited financial resources.
Metropolitan areas create additional difficulties because economic and physical urban regions frequently extend far beyond official city boundaries. Fragmented governance can make it difficult to coordinate infrastructure and land-use decisions across an entire urban region.
Participatory approaches offer another model. Porto Alegre's experience with participatory budgeting demonstrates how residents can become directly involved in deciding public investment priorities.
Strong urban institutions must also develop the capacity to finance large infrastructure investments. Cities in low- and middle-income countries face especially large financing needs as they attempt simultaneously to accommodate population growth, reduce poverty, expand services, and prepare for climate change.
The Future of Cities
The future of urbanization will be shaped by decisions being made today about land, housing, transportation, infrastructure, energy, climate adaptation, ecosystems, and governance.
Because roads, buildings, water systems, neighborhoods, and other infrastructure can remain in place for many decades, development patterns established during periods of rapid growth can become difficult and expensive to change.
Urban policy therefore increasingly emphasizes planning ahead of expansion rather than attempting to repair poorly planned growth afterward.
Sustainable urbanization involves more than environmental protection. It requires cities that are economically productive, socially inclusive, physically accessible, environmentally resilient, and capable of providing adequate housing and basic services.
The United Nations Sustainable Development Goals identify inclusive, safe, resilient, and sustainable cities as an international development priority. Progress remains uneven, particularly as the number of people living in informal settlements continues to grow and many cities struggle with housing affordability, disappearing green space, climate risks, and inadequate transportation.
At the same time, cities have become important centers of experimentation. Urban governments are developing new approaches to transportation, green infrastructure, climate adaptation, housing, public space, ecological restoration, and citizen participation.
One of the central questions of the twenty-first century will therefore not be whether urbanization continues, but what kind of cities emerge from it.
Conclusion
Urbanization is neither inherently beneficial nor inherently destructive. It is a process that can generate extraordinary economic opportunity, cultural exchange, innovation, and access to services while simultaneously producing inequality, environmental degradation, housing shortages, congestion, and vulnerability to climate hazards.
The evidence from cities around the world suggests that the quality of urbanization matters as much as its scale.
Cities that expand without adequate planning can lock themselves into expensive infrastructure, long travel distances, environmental damage, informal development, and unequal access to opportunity. Cities that coordinate land use, housing, transportation, infrastructure, public health, environmental protection, and economic development have greater potential to convert population concentration into broad social benefits.
Future urban growth will increasingly occur in regions where governments face limited financial and institutional capacity, particularly in Africa and Asia. How these cities manage housing, land, infrastructure, transportation, climate resilience, and public services will have consequences far beyond municipal boundaries.
Urbanization is consequently one of the central challenges of sustainable development. The cities being constructed and transformed today will shape economic opportunity, human health, biodiversity, resource consumption, climate resilience, and everyday life for billions of people throughout the remainder of the twenty-first century.
Global Urbanization and the Future of Cities
| Divyanshi Wadhwa | World Bank | 2026
The World Bank examines the continuing shift toward urban living, noting that future urban population growth will increasingly occur in smaller and intermediate-sized cities as well as major metropolitan regions.
| UN-Habitat | UN-Habitat | 2026
The World Cities Report 2026 examines the worldwide housing crisis and the challenge of providing adequate housing, infrastructure, services, and climate resilience as urban populations continue growing.
| United Nations | United Nations Sustainable Development | 2026
The United Nations reviews progress toward Sustainable Development Goal 11 and explains how rapid urban growth is affecting housing, transportation, public space, infrastructure, pollution, and climate resilience.
| United Nations Statistics Division | United Nations | 2026
The 2026 SDG assessment finds continuing growth in the global slum population while tracking changing patterns of urban land consumption, public transportation access, and public-space availability.
| United Nations DESA | United Nations | 2026
The official SDG 11 page brings together global evidence on urban poverty, housing, transportation, disasters, land expansion, governance, and the sustainability of cities.
| United Nations DESA | United Nations | 2026
This resource examines sustainable urban development as a cross-cutting development issue involving housing, infrastructure, governance, climate adaptation, public services, and rural-urban relationships.
| United Nations | United Nations Sustainable Development | 2025-11-13
The article introduces new global urbanization estimates and explains the growing demographic importance of cities and towns through 2050.
| United Nations DESA Population Division | United Nations | 2025
The World Urbanization Prospects 2025 provides updated estimates and projections of urban and rural populations worldwide, illustrating how settlement patterns and city growth are reshaping the global population through 2050.
| United Nations Statistics Division | United Nations | 2025
This assessment examines housing affordability, informal settlements, disappearing green space, urban climate risks, public transportation, and participation in city planning.
| United Nations Population Division | United Nations | 2025
The World Urbanization Prospects portal provides population estimates, city data, projections, and methodological resources for studying the global urban transition.
| UN-Habitat | UN-Habitat | 2024
The report explores the close relationship between urbanization and climate change, showing how cities are simultaneously major sources of emissions and centers of growing exposure to heat, flooding, and other hazards.
| UN-Habitat | UN-Habitat | 2022
UN-Habitat examines alternative futures for cities after the COVID-19 pandemic and argues that urbanization will remain one of the defining global demographic and economic trends of the twenty-first century.
| World Bank | World Bank | 2021-05-19
The report examines how urbanization interacts with demographic change, including aging populations, rapidly growing cities, shrinking cities, migration, infrastructure needs, and public spending.
| OECD and European Commission | OECD | 2020-06-16
This analysis introduces a globally consistent method for defining cities and urban areas, allowing urbanization trends to be compared more reliably between countries.
| UN-Habitat | UN-Habitat | 2020
This report argues that well-managed urbanization can create economic, social, and environmental value through greater productivity, innovation, infrastructure efficiency, and access to services.
| United Nations DESA | United Nations | 2018-04-09
The article explores how urbanization and migration interact as cities become gateways for domestic and international population movement.
| United Nations | United Nations Sustainable Development | 2018
The article considers what makes cities sustainable, emphasizing urban design, connectivity, recycling, public transportation, inclusion, innovation, and local governance.
| UN-Habitat | UN-Habitat | 2016
The World Cities Report 2016 evaluates two decades of urban change and warns that prevailing patterns of sprawl, inequality, informality, and environmental degradation are often unsustainable.
| David E. Bloom and Tarun Khanna | IMF Finance & Development | 2007-09
The authors examine the historic transition toward a majority-urban world and discuss both the productivity advantages of cities and the housing, infrastructure, environmental, and governance problems created by rapid growth.
| United Nations Population Division | UN DESA | n.d.
This overview provides historical and projected statistics on urban population growth and links to decades of United Nations research on cities and urbanization.
Urban Form, Density, Sprawl, and Infrastructure
| Yingcheng Li et al. | Nature Communications | 2026-02-21
An analysis of more than 1,800 cities compares horizontal and vertical urban growth and finds significant differences between development patterns in the Global North and Global South.
| Communications Earth & Environment Authors | Communications Earth & Environment | 2026
Research covering thousands of cities examines how mountains, coastlines, rivers, and other geographic constraints affect horizontal expansion and encourage denser or taller development.
| Rafael Prieto-Curiel, Pavel Luengas-Sierra and Christian Borja-Vega | Nature Cities | 2025-12-02
Research on more than 100 cities finds that sprawling urban development increases the cost of water and sanitation networks and can leave peripheral communities underserved.
| Cheng Zhong et al. | Communications Earth & Environment | 2025-11-27
The study proposes improved ways of measuring urban land-use efficiency so planners can distinguish productive densification from inefficient sprawl and unnecessary conversion of farmland and ecosystems.
| Luyao Wang, Albert Saiz and Weipeng Li | Nature Cities | 2024-09-04
This global study finds that mountains, water bodies, and other natural barriers encourage denser cities but can complicate transportation and limit metropolitan population growth.
| Steve Frolking et al. | Nature Cities | 2024-08-05
Satellite observations of more than 1,550 cities reveal a broad shift from predominantly outward urban expansion toward increasing vertical development.
| Miao Yang et al. | Nature Cities | 2024-07-05
The study shows that land cover immediately outside cities can significantly influence urban temperatures, demonstrating the importance of metropolitan-scale rather than purely municipal planning.
| Jian Peng et al. | npj Urban Sustainability | 2024-03-15
Research on 31 Chinese cities investigates how newly urbanized areas develop surface heat-island effects after conversion from rural land.
| Xueli Yang et al. | npj Urban Sustainability | 2024-02-27
Research across hundreds of American urban sites examines how megacities and anthropogenic heat influence regional heatwave networks.
| Richa Mahtta et al. | npj Urban Sustainability | 2022-02-11
A study of more than 300 cities finds that population growth remains a major driver of urban land expansion while economic growth and governance increasingly influence how much land cities consume.
| Communications Earth & Environment Authors | Communications Earth & Environment | 2021
Researchers reconstruct and project global urban land growth across more than two centuries, illustrating the enormous acceleration in the physical footprint of cities.
| Anjali Mahendra and Karen C. Seto | World Resources Institute | 2019-01-31
An analysis of nearly 500 cities explores the consequences of outward and vertical growth and argues that unmanaged expansion raises infrastructure costs, inequality, environmental damage, and commuting distances.
| Jillian Du and Anjali Mahendra | World Resources Institute | 2019-01-31
The authors explain why outward urban expansion can make infrastructure and public services more expensive while increasing transportation burdens and consuming agricultural and natural land.
| World Resources Institute | World Resources Institute | 2018
WRI argues that compact urban development could produce enormous economic savings by reducing infrastructure requirements, transportation costs, energy use, and greenhouse-gas emissions.
The report develops a framework for understanding how rapidly growing cities can expand access to housing, transportation, water, sanitation, and energy while reducing urban inequality.
This report analyzes metropolitan governance and shows how fragmented responsibility for transportation, land use, housing, and public services can reduce urban efficiency.
| UN-Habitat | UN-Habitat | 2015
The International Guidelines on Urban and Territorial Planning establish principles for compact development, connectivity, inclusion, environmental protection, and coordinated planning.
| UN-Habitat | UN-Habitat | 2013
The report treats streets not merely as transportation corridors but as essential public spaces affecting accessibility, economic activity, social interaction, and the physical structure of cities.
| World Bank | World Bank | 2013
The report argues that successful urbanization requires governments to coordinate land-use planning, transportation connections, infrastructure investment, and municipal finance.
| UN-Habitat | UN-Habitat | 2009
This landmark report argues that conventional planning often fails to address sprawl, informal development, climate change, poverty, shrinking cities, and peri-urban growth.
Urbanization in Africa
| World Bank | World Bank | 2026-06-25
The World Bank examines how Middle Eastern and North African cities could generate more jobs through productive density, infrastructure, connectivity, housing, and improved business environments.
| United Nations Environment Programme | UNEP | 2026-04-13
Nairobi provides a current example of efforts to integrate rapid urban growth with green neighborhoods, ecosystem restoration, renewable energy, sustainable mobility, and climate resilience.
| UN-Habitat | UN-Habitat | 2026
The State of African Cities Report examines how urban land, infrastructure investment, municipal finance, housing, and planning could determine whether Africa's urban transition becomes economically transformative.
| UN-Habitat | UN-Habitat | 2026
The executive summary highlights land-value capture, infrastructure finance, informal land systems, housing, resilience, and rapidly increasing urban populations.
| Carlos Mureithi, Rachel Savage and Eromo Egbejule | The Guardian | 2025-10-26
Reporting from Nairobi, Johannesburg, and Abidjan illustrates how rapid urban expansion can overwhelm transportation systems and lengthen daily commutes.
| OECD, African Development Bank, Cities Alliance and UCLG Africa | OECD | 2025-03-06
This major assessment projects that Africa's urban population could double from roughly 700 million to 1.4 billion by 2050 and analyzes more than 11,000 urban agglomerations.
| Associated Press | AP News | 2025-01-12
The article examines Tatu City outside Nairobi as an example of privately planned urban development and considers the competing questions of infrastructure, affordability, governance, and social inclusion.
| Rachel Savage | The Guardian | 2024-08-22
The article explores forecasts that six African urban regions will exceed 10 million residents by 2035 and considers pressures on jobs, housing, utilities, infrastructure, and public services.
| OECD and Sahel and West Africa Club | OECD | 2023-03-21
The report maps the changing geography of urbanization and armed conflict in North and West Africa and examines how city growth affects security, migration, and political geography.
The authors examine why Nairobi and other African cities often fall short of their potential to generate jobs and productivity despite rapid population growth and economic concentration.
| Melap Sitati | Brookings Institution | 2023-02-16
Nairobi is used as a case study of how transportation, labor markets, business conditions, land use, and governance influence the economic benefits of urban concentration.
| Government of Kenya and UN-Habitat | UN-Habitat | 2023
Kenya's urban strategy focuses on land management, housing, infrastructure, informal-settlement upgrading, municipal finance, climate change, resilience, and social inclusion.
| OECD, UNECA and African Development Bank | OECD | 2022-04-26
The report finds that African cities generally provide higher wages, better educational opportunities, greater service access, and productivity advantages compared with surrounding rural areas.
| Rogier van den Berg, Betsy Otto and Aklilu Fikresilassie | World Resources Institute | 2021-05-11
Rapid urban population growth across Africa is increasing competition for limited water supplies and making long-term water-security planning increasingly important.
| John Page, Jeffrey Gutman, Payce Madden and Dhruv Gandhi | Brookings Institution | 2020-09-29
Brookings develops a framework for explaining why many African cities have not captured the full productivity benefits normally associated with urban agglomeration.
| United Nations Economic Commission for Africa | UNECA | 2018-03-05
UNECA argues that Africa can benefit more from urbanization by reconnecting city growth with industrialization, manufacturing, infrastructure investment, and broader structural economic transformation.
| Ede Ijjasz-Vasquez and Paula Restrepo Cadavid | World Bank | 2017-12-14
Although focused outside Africa, this comparative study provides a useful counterpoint to rapid African growth by examining cities experiencing population decline rather than expansion.
| Brookings Institution | Brookings Institution | 2015
The article argues that African urban policy should be treated as a national development issue because cities increasingly determine economic growth, infrastructure demand, employment, and government finances.
| UN-Habitat | UN-Habitat | 2014
This regional assessment considers Africa's simultaneous demographic, economic, technological, environmental, and political transitions and calls for new models of urban development.
| UN-Habitat | UN-Habitat | 2010
The report analyzes African urban growth through governance, inequality, poverty, informal settlements, land markets, municipal finance, and economic development.
Urbanization in Asia
| World Bank | World Bank | 2026-03-05
The study examines India's rapidly growing Census Towns and considers how governance and municipal financing systems need to change as formerly rural settlements become increasingly urban.
| Ronghua Xu et al. | npj Urban Sustainability | 2026-02-09
The study compares urban expansion and associated heat hazards across capital and secondary cities in Southeast Asia.
| Abedalrazq F. Khalil, Sumila Gulyani, Manoj Sharma and Srinivas Sampath | World Bank | 2025-12-18
The authors outline strategies for accommodating India's expanding urban population while addressing congestion, housing shortages, sprawl, infrastructure deficits, and climate risk.
| npj Urban Sustainability Authors | npj Urban Sustainability | 2025
Research on China identifies changing population patterns in which some regions are moving from intense metropolitan concentration toward suburbanization and counter-urbanization.
| Soumya Satyakanta Sethi and V. Vinoj | Nature Cities | 2024-05-15
Researchers find that urbanization is substantially amplifying warming across Indian cities, including fast-growing Tier-II cities that receive less attention than the country's largest metropolitan areas.
| World Resources Institute | World Resources Institute | 2022
Satellite analysis of ten Indian cities shows how expanding built-up areas can replace surface water, vegetation, wetlands, and groundwater recharge areas.
| Ani Dasgupta | World Resources Institute | 2016-12-01
WRI argues that more compact and connected development could allow Indian cities to improve economic productivity while lowering infrastructure, energy, and transportation costs.
| World Bank | World Bank | 2015-09-24
The World Bank describes India's urbanization as partly hidden and spatially fragmented, with extensive peripheral development, informal settlements, infrastructure gaps, and growing metropolitan regions.
| World Bank | World Bank | 2015-03-17
Lessons from China's urban transition emphasize the importance of compact development, transportation connectivity, coordinated land use, and avoiding fragmented peripheral sprawl.
| World Bank and Development Research Center of China's State Council | World Bank | 2014
This major report proposes reforms to land policy, migration restrictions, municipal finance, planning, environmental management, and governance as China continues its enormous urban transition.
Latin America and the Caribbean
| Reuters | Reuters | 2026-08-03
Bogotá provides a contemporary case study of efforts to integrate housing, public transportation, cycling infrastructure, green construction, climate resilience, and social inclusion in a rapidly changing metropolis.
| Shlomo Angel et al. | Inter-American Development Bank | 2025-05-29
A study of 70 Latin American and Caribbean cities examines how governments can accommodate future urban population growth through planned expansion, densification, infrastructure, and land management.
| Roberto Madera Arends et al. | Inter-American Development Bank | 2024-06
The guide introduces satellite-based tools that allow planners to measure urban expansion, land-cover change, and heat-island patterns.
| Inter-American Development Bank | IDB | 2024-05-31
The article examines the governance problems created when metropolitan growth spreads across municipal boundaries and requires coordination at a regional scale.
| Inter-American Development Bank | IDB | 2024-02-09
The article considers how Latin American cities are likely to grow through both densification and outward expansion while confronting metropolitan coordination and climate-related migration.
| Inter-American Development Bank | Inter-American Development Bank | 2015
The report reviews Latin America's long urban transition, including slower growth of some megacities, faster expansion of intermediate cities, and continuing increases in physical urban footprints.
| Nora Ruth Libertun de Duren | Inter-American Development Bank | 2014-12
This study compares rapid urbanization in Latin America and China and examines migration, infrastructure demand, economic development, and municipal governance.
| Haroldo Da Gama Torres | Inter-American Development Bank | 2011-03
The report examines environmental and social consequences of peri-urban sprawl in secondary Latin American cities and discusses compact growth and settlement regularization.
| José Brakarz, Eduardo Rojas and Margarita Greene | Inter-American Development Bank | 2002-01
The report reviews neighborhood-upgrading programs intended to improve infrastructure, housing, tenure security, and public services in informal urban settlements across Latin America.
| Inter-American Development Bank | IDB | n.d.
The IDB's urban development framework addresses migration, metropolitan sprawl, housing shortages, pollution, infrastructure, productivity, governance, and climate resilience throughout Latin America and the Caribbean.
Climate Change, Heat, and the Urban Environment
| Eqi Luo et al. | Communications Earth & Environment | 2026-08-06
Research on rapidly developing cities of the Arabian Peninsula examines how urban expansion changes local temperature patterns while increasing the number of people exposed to extreme heat.
| Marzie Naserikia et al. | Communications Earth & Environment | 2026-05-25
Satellite observations of roughly 1,400 cities find increasing urban surface temperatures and a major rise in human exposure to extreme daytime heat.
| Miao Yu et al. | npj Urban Sustainability | 2026-05-21
Researchers examine how the urban heat-island effect interacts with global warming and changing population exposure to influence heat-related mortality risks.
| Shengjun Gao et al. | npj Urban Sustainability | 2026-02-18
An analysis of 936 cities finds that urbanization intensifies compound daytime and nighttime heatwaves and can create unequal heat exposure within urban populations.
| John Friesen and Hannes Taubenböck | Scientific Reports | 2025-09-23
The study compares future heat exposure and adaptive capacity in more than 1,500 large cities using climate projections, urban form, and socioeconomic conditions.
WRI explains why buildings, pavement, and reduced vegetation make cities hotter and reviews cooling strategies including urban trees, reflective roofs, shade, and redesigned public spaces.
| Peng Ji et al. | Communications Earth & Environment | 2025-04-24
Analysis of hundreds of urban-rural station pairs finds that urbanization causes compound day-and-night heatwaves to begin earlier, occur more frequently, and reach higher temperatures.
| Nature Cities Authors | Nature Cities | 2025
Research covering more than 2,300 Global South cities finds that declining urban vegetation can exacerbate heat stress during rapid development.
| Shuangcheng Huang et al. | Nature Cities | 2024-08-07
The study finds that urbanization can intensify extreme drought by modifying land surfaces, hydrology, atmospheric conditions, and local climate processes.
| Ryan A. McManamay et al. | Communications Earth & Environment | 2024-02-07
Researchers project that continued urban land expansion could disrupt terrestrial carbon storage and alter the global land-carbon balance.
| npj Climate and Atmospheric Science Authors | npj Climate and Atmospheric Science | 2024
A study of more than 1,000 cities finds that urbanization-induced warming increases human exposure to compound heatwaves in most cities studied.
| npj Urban Sustainability Authors | npj Urban Sustainability | 2024
A global analysis examines the relationship between urban land expansion, population density, and carbon dioxide emissions from 2000 through 2020.
| United Nations Environment Programme | UNEP | 2022-05-05
Kampala and other rapidly growing African cities illustrate the relationship between urbanization, motorization, waste burning, industrial emissions, and deteriorating air quality.
| United Nations Environment Programme | UNEP | 2022-02-22
Examples from cities around the world demonstrate how tree planting, restored waterways, urban gardens, and green corridors can address heat, flooding, pollution, and biodiversity loss.
| United Nations Environment Programme | UNEP | 2021-11-18
UNEP argues that future cities must address climate change, biodiversity loss, pollution, inequality, infrastructure, transportation, and urban planning simultaneously.
| Inger Andersen | UNEP | 2021-06-30
The article argues that cities need urban forests, green roofs, permeable surfaces, restored waterways, urban agriculture, and other nature-based infrastructure.
| United Nations Environment Programme | UNEP | 2019-10-31
This overview examines urban environmental challenges including air pollution, sanitation, waste, energy use, green space, and sustainable transportation.
| E. Scott Krayenhoff et al. | Nature Climate Change | 2018-11-12
Modeling of American cities demonstrates that climate change, urban expansion, and adaptation measures interact in complex ways and produce different daytime and nighttime temperature effects.
| United Nations Environment Programme | UNEP | 2014-04-09
UNEP argues that urbanization can improve resource efficiency if environmental concerns are incorporated into city planning before development patterns become locked in.
| Eugenia Kalnay and Ming Cai | Nature | 2003-05-29
This influential study estimates the climatic effects of urbanization and land-use change and distinguishes them from broader greenhouse-driven warming.
Flooding, Water, and Urban Resilience
| Dingyu Xuan et al. | npj Natural Hazards | 2026-02-25
The study investigates tipping points that emerge when extreme precipitation, urban growth, drainage infrastructure, and river systems interact.
| Elizabeth Jane Wesley et al. | World Resources Institute | 2026
The report presents methods for identifying where trees, cool surfaces, shade, and other heat-resilient infrastructure can feasibly be deployed within cities.
| Reuters | Reuters | 2025-07-22
The article reports that India's rapidly growing cities will require massive investment in resilient housing, transportation, water, drainage, and waste infrastructure through 2050.
The study shows that street networks, buildings, drainage systems, and other elements of urban form strongly influence how floodwaters concentrate and move through cities.
| Associated Press | AP News | 2024-05-24
The article reports scientific findings that climate change and rapid urban growth intensified the destructive effects of severe flooding in East Africa.
| Karin Sjöstrand | Nature Reviews Earth & Environment | 2022-10-24
The research examines the complex spatial relationships among flooding events in heavily urbanized watersheds and the implications for flood-protection planning.
| Salah Basem Ajjur and Sami G. Al-Ghamdi | Scientific Reports | 2022-07-18
Doha provides a case study of the interconnected effects of urban expansion, climate change, impermeable surfaces, and growing flood risk.
Research across 15 cities finds widespread unsafe management of sewage and fecal sludge and calls for citywide approaches to sanitation rather than solutions limited to individual households.
A study of 15 Global South cities finds that conventional statistics often overestimate meaningful water access because they overlook affordability, reliability, quality, and availability.
| Wei Zhang et al. | Nature | 2018-11-14
Researchers conclude that Houston's urbanization increased both rainfall and flood response during Hurricane Harvey, substantially worsening the probability of extreme flooding.
Informal Settlements, Slums, and Housing
| Beatriz Eraso Puig | World Bank | 2026-08-11
This recent assessment tracks Kenya's ongoing effort to expand basic services, tenure security, infrastructure, and institutional capacity in urban informal settlements.
| Rachel Savage | The Guardian | 2026
Cape Town illustrates how fast population growth, tourism, housing shortages, informal development, and limited infrastructure can combine into a metropolitan affordability crisis.
| Judy Baker, Sheila Kamunyori and Keziah Mwang'a | World Bank | 2022-06-09
The authors revisit sites-and-services housing programs as a possible response to rapidly expanding African cities where formal housing supply cannot meet demand.
| UN-Habitat | UN-Habitat | 2019
The report investigates financing mechanisms that could move Nairobi from scattered informal-settlement projects toward upgrading at metropolitan scale.
| UN-Habitat | UN-Habitat | 2016
This report examines urban informality in Kenya and the institutional and planning challenges involved in integrating informal settlements into city development.
| World Bank | World Bank | 2016
A detailed analysis of Kenya's housing market finds that expensive land, construction costs, financing barriers, regulations, and rapid population growth contribute to widespread informal housing.
| UN-Habitat | UN-Habitat | 2010
This study examines Tanzania's urbanization and evaluates attempts by government, NGOs, and communities to improve informal settlements in Dar es Salaam.
| UN-Habitat | UN-Habitat | 2008
This guide examines rural-to-urban migration, poverty, informal housing, land markets, and the economic role played by low-income residents in Asian cities.
| UN-Habitat | UN-Habitat | 2007
The Kenya Slum Upgrading Programme illustrates how rapid city growth can overwhelm public-service provision and contribute to large informal settlements.
| UN-Habitat | UN-Habitat | 2005
The Nairobi Urban Profile examines the extraordinary concentration of population growth in informal settlements and the resulting challenges for land, housing, governance, and infrastructure.
Urban Health, Inequality, and Social Conditions
WRI examines how differences in vegetation, pavement, housing quality, income, and infrastructure can produce dramatic inequalities in heat exposure between neighborhoods of the same city.
| Amoolya Rajappa | The Guardian | 2025-05-19
Reporting from Bengaluru shows how poor ventilation, dense informal housing, inadequate electricity, and lack of green space intensify heat exposure among low-income urban residents.
| World Health Organization | WHO | 2025-03-19
WHO summarizes the health consequences of urbanization, including air pollution, inadequate sanitation, infectious disease, chronic disease, traffic injuries, unhealthy housing, and sharp inequalities between neighborhoods.
| World Health Organization | WHO | 2024-10-31
A study of 20 cities examines how local governments are addressing noncommunicable diseases and injuries through transportation, planning, regulation, and health policy.
| Kushal T. Kadakia and Sandro Galea | Milbank Quarterly | 2023-04
The authors propose an urban-health agenda for 2050 emphasizing sanitation, integrated data, Health in All Policies, scaling of successful interventions, and reduction of inequalities within cities.
| World Health Organization Regional Office for Europe | WHO | 2022-06-14
Twelve city case studies examine how urban planning can improve resilience while protecting environmental and human health.
| World Health Organization | WHO | 2020-05-21
WHO argues that decisions about density, infrastructure, housing, water, transportation, and open space have major long-term public-health consequences.
| World Health Organization and UN-Habitat | WHO | 2020-05-01
This sourcebook explains how urban planning influences health through housing, transportation, sanitation, pollution exposure, physical activity, and access to services.
| World Health Organization | WHO | 2019-08-20
This overview describes cities as places that concentrate both economic opportunity and health hazards such as pollution, violence, isolation, traffic injuries, and poor housing.
| World Health Organization | WHO | 2019-08-08
WHO argues that health-oriented city design can reduce chronic disease while supporting low-carbon transportation and climate resilience.
| Edgar Pieterse and Kate Owens | World Resources Institute | 2018-12-18
Johannesburg demonstrates how historic patterns of segregation can continue shaping transportation, housing, employment access, and economic inequality long after discriminatory laws are removed.
UNICEF presents ten principles for child-responsive planning designed to make rapidly growing cities healthier, safer, greener, more inclusive, and more equitable.
The report shows how average measures of urban prosperity can conceal severe deprivation among children living in poor neighborhoods and informal settlements.
| Martha Chen and Victoria A. Beard | World Resources Institute | 2018-05-29
The report argues that urban policy in the Global South must recognize informal workers because they constitute a major share of city employment and economic activity.
The report examines the growing shortage of adequate, secure, and affordable housing in rapidly urbanizing countries across Africa, Asia, and Latin America.
| Alhaji A. Aliyu and Lawal Amadu | Annals of African Medicine | 2017
Nigeria's rapid urbanization is examined in relation to sanitation, waste disposal, traffic, slums, infectious diseases, environmental degradation, and rising chronic disease.
| Systematic Review Authors | World Health & Population | 2014
This systematic review evaluates differences between urban and rural health in developing countries and finds that urbanization can bring both health advantages and new risks.
| Eliya M. Zulu et al. | Journal of Urban Health | 2011-06-29
Research from Nairobi's Korogocho and Viwandani settlements examines the complicated interactions among rural-urban migration, poverty, housing conditions, and health.
| World Health Organization | Bulletin of the World Health Organization | 2010-04-01
This overview considers the public-health implications of humanity becoming predominantly urban and emphasizes that cities can concentrate both health opportunities and serious environmental risks.
| David Vlahov and Sandro Galea | Journal of Urban Health | 2002-03
A foundational urban-health article distinguishes the process of urbanization from the conditions of urban living and examines how social, physical, and service environments affect health.
Urban Ecology, Biodiversity, and Food Systems
| Xinghao Lu et al. | Nature Cities | 2026-02-20
The study examines how decades of different urban-development trajectories have produced lasting and uneven effects on bird biodiversity.
| The Guardian | The Guardian | 2025-05-14
Rio de Janeiro's favelas provide an example of how informal urban development, environmental history, flooding, sanitation, and climate resilience intersect.
| Gökhan Şen | Scientific Reports | 2025-01-04
A case study from Bartın, Türkiye examines how migration-driven population growth contributes to urban sprawl and conversion of agricultural and open land.
| Lei Ning, Shuangqing Sheng and Yue Meng | Scientific Reports | 2024-12-30
Research on major Chinese metropolitan regions examines the relationship between physical urban expansion and cities' ability to withstand economic, environmental, and disaster-related disturbances.
| Food and Agriculture Organization | FAO | 2024-11-19
FAO examines how municipal governments and local stakeholders can use urban food policy to improve nutrition, sustainability, resilience, and rural-urban food connections.
| Mark C. Mainwaring, Guobao Song and Shuping Zhang | Scientific Reports | 2024-11-13
This synthesis considers how urbanization transforms habitats and creates both threats and new ecological niches for plants and animals living in cities.
| High Level Panel of Experts on Food Security and Nutrition | FAO/CFS | 2024-07-02
The article reports that approximately 1.7 billion people living in urban and peri-urban areas experience food insecurity, challenging the assumption that hunger is primarily a rural problem.
| Committee on World Food Security | FAO | 2024
The report examines how rapid urbanization is transforming food production, distribution, nutrition, water, energy, transportation, and governance across city regions.
| Amy K. Hahs et al. | Nature Communications | 2023-08-07
Data from 379 cities on six continents show that urbanization systematically favors some animal traits while disadvantaging others, reshaping urban ecological communities.
| Sean Goodwin et al. | Nature Sustainability | 2023-01-30
Researchers map nature-based climate adaptation projects around the world and examine how cities use ecosystems to address climate and social risks.
| S. de Bruin and C. Holleman | Food and Agriculture Organization | 2023
A systematic review and meta-analysis examines how urbanization transforms agrifood systems, dietary patterns, food supply chains, and access to healthy food across the rural-urban continuum.
| Urban Wildlife Information Network Researchers | Nature Ecology & Evolution | 2023
Research across 20 North American cities finds that vegetation, climate, city structure, and species traits interact to determine how mammals respond to urbanization.
| Nature Communications Authors | Nature Communications | 2023
A global study of more than 1,000 cities examines how urban growth changed residents' exposure to vegetation and inequalities in access to green space.
| United Nations Environment Programme | UNEP | 2022-02-24
City leaders discuss urban forests, restored waterways, sustainable food systems, recycled materials, and nature-based approaches to rapid urban development.
| Yuxue Feng et al. | Nature Communications | 2022
Researchers project substantial losses of natural habitat from future urban expansion through 2100 and warn that fragmentation may produce ecological effects extending well beyond the land directly converted.
| UNEP | United Nations Environment Programme | 2022
The article describes cities as simultaneously major sources of environmental pressure and important laboratories for climate adaptation, pollution reduction, and ecological restoration.
| Inger Andersen | UNEP | 2019-09-22
UNEP examines how architecture, infrastructure, ecosystems, and the built environment could be redesigned to reduce the environmental footprint of increasingly urban societies.
| United Nations Environment Programme | UNEP | 2019-05-14
The article examines how urban trees can filter pollution, cool neighborhoods, improve health, and restore ecological functions as cities expand.
| Nature Sustainability Authors | Nature Sustainability | 2019
A review of more than 900 studies examines the direct conversion of habitat caused by urban development and highlights major gaps in understanding the indirect biodiversity effects of cities.
| International Sustainability Unit | FAO-hosted Report | 2015-04
The report develops the concept of city-region food systems and argues that sustainable urbanization requires stronger economic, ecological, and food-system connections between cities and their surrounding rural regions.
Transportation, Energy, Governance, and the Urban Economy
| Reuters | Reuters | 2026-06-18
Satellite observations of Dubai, Lagos, Mexico City, Mumbai, Seattle, and Shenzhen reveal an urban "pulse" created by cycles of construction, demolition, redevelopment, and infrastructure expansion.
| David Cutler | IMF Finance & Development | 2024-12
The article explores why cities remain central to economic development by concentrating workers, firms, infrastructure, knowledge, education, and opportunities for specialization.
| Christo Venter, Anjali Mahendra and Dario Hidalgo | World Resources Institute | 2019-05-14
The report argues that rapid urbanization combined with growing automobile ownership can reduce access to jobs and services unless cities prioritize public transportation, walking, cycling, and multimodal mobility.
| Shuaib Lwasa and Kate Owens | World Resources Institute | 2018-10-31
Kampala provides a case study of how improving sanitation services in a rapidly growing city can strengthen both public health and confidence in local government.
The authors examine how rapid urbanization and motorization increase traffic deaths and describe street-design changes that can improve safety for pedestrians, cyclists, and drivers.
| Rebecca Abers, Robin King, Daniely Votto and Igor Brandão | World Resources Institute | 2018-06-13
Porto Alegre's participatory budgeting system is examined as an example of how urban residents can directly influence infrastructure priorities, public spending, and city governance.
The authors examine how rapid city growth in Africa and Asia is increasing energy demand and explore clean cooking, distributed renewable energy, efficiency, and universal electricity access.
| Wanli Fang | World Resources Institute | 2014-09-17
The article argues that compact and connected urban development can simultaneously lower infrastructure costs, reduce greenhouse-gas emissions, improve transportation, and produce public-health benefits.
| World Resources Institute | World Resources Institute | 2014-05-29
Transit-oriented development is presented as a strategy for concentrating housing and economic activity near public transportation and reducing dependence on private automobiles.
| Johannes F. Linn | Brookings Institution | 2008-05-27
The author examines the relationship between urbanization and sustained economic growth and discusses practical implications for infrastructure investment and national development strategies.
Urban Policy and Planning
The report reviews emerging urban-policy priorities involving housing, resilience, demographic change, economic growth, environmental pressures, and inclusive development.
| OECD and UN-Habitat | OECD | 2024-11-05
A review of national urban policies in 78 countries examines how governments are attempting to manage housing, inequality, resilience, climate change, and rapid urban growth.
| OECD, UN-Habitat and Cities Alliance | OECD | 2021
This global review examines national urban policies in 162 countries and considers how national governments can coordinate increasingly complex urban development.
Research covering more than 1,100 urban areas examines the causes and consequences of low-density, fragmented development and policies that can limit sprawl.
| OECD and UN-Habitat | OECD | 2018-03-20
The report surveys national approaches to managing urbanization and examines how central governments can coordinate policies affecting cities.
This major study examines why metropolitan areas grow, how urbanization affects economic prosperity and quality of life, and why present planning decisions have long-term consequences.
Korea provides a case study of compact development, urban regeneration, transportation integration, mixed land use, and attempts to control urban sprawl.
This comparative assessment considers whether compact urban development can reduce environmental impacts while improving transportation efficiency and economic performance.
OECD proposes a functional approach to defining metropolitan areas that improves international comparisons of urban populations, economies, environmental impacts, and governance.
The report compares urbanization and urban policy across OECD countries and considers lessons for rapidly urbanizing economies.
Urbanization, Economic Development, and Regional Transformation
| World Bank | World Bank | 2026
The report estimates the enormous investment requirements for resilient and low-carbon urbanization in low- and middle-income countries through 2050.
| Mark Roberts, Frederico Gil Sander and Sailesh Tiwari | World Bank | 2019
Indonesia provides a major case study of how urbanization can generate prosperity while simultaneously producing congestion, inadequate services, inequality, and expanding slums.
| World Bank | World Bank | 2018
The World Bank's Urbanization Reviews compare urban development problems and policy responses across countries and regions undergoing rapid economic and spatial transformation.
| Somik V. Lall, J. Vernon Henderson and Anthony J. Venables | World Bank | 2017
The authors argue that many African cities are crowded without achieving sufficient economic density because land, transportation, infrastructure, and investment systems remain fragmented.
| World Bank | World Bank | 2017
The report examines the contradiction between East Asia's urban economic success and continuing inequality in housing, transportation, sanitation, infrastructure, and disaster exposure.
| World Bank | World Bank | 2015-01-26
Satellite analysis documents enormous physical expansion of East Asian cities and demonstrates how administrative boundaries frequently fail to match actual metropolitan development.
| Peter Ellis and Mark Roberts | World Bank | 2015
The study describes South Asian urbanization as frequently messy and hidden and examines congestion, housing shortages, infrastructure deficits, planning failures, and urban governance.
| World Bank | World Bank | 2013
This synthesis examines sustainable urban development through land management, energy, buildings, transportation, water, waste, resilience, and city-level environmental indicators.
| World Bank | World Bank | 2009
The Systems of Cities strategy argues that density, proximity, agglomeration, city management, land markets, housing, and infrastructure are central to economic development.
| World Bank | World Bank | n.d.
This publication series examines changing urban issues including municipal government, economic development, poverty, infrastructure, climate risk, land use, and city finance.
Research, Debate, and Urbanization Case Studies
| Reuters | Reuters | 2026-05-26
The article examines why successful city-level climate, transportation, infrastructure, and nature-based innovations often remain difficult to finance and reproduce at metropolitan and national scale.
| Klaus Desmet and J. Vernon Henderson | Regional Science and Urban Economics | 2021
The study shows how equally populous cities can differ dramatically in land area, building height, interior floor space, and residential crowding depending on national income.
| Assem Abu Hatab et al. | Cities | 2019-11
A systematic review examines how urban sprawl changes agricultural land, food production, supply chains, food security, and rural-urban relationships in developing countries.
| J. Vernon Henderson and Matthew A. Turner | Journal of Urban Economics | 2017
This introduction argues that rapid urbanization in developing countries demands a much broader research agenda on transportation, housing, land, labor markets, infrastructure, and urban productivity.
| Gilles Duranton | Handbook of Regional and Urban Economics | 2015
This review examines rural-to-urban migration, tenure insecurity, squatting, land markets, and shortages of affordable housing in developing-country cities.
| World Bank | World Bank | 2012
Colombia's Urbanization Review examines land and housing markets, municipal finance, connectivity, metropolitan coordination, infrastructure, and inequality across its system of cities.
| World Bank | World Bank | 2011
The Vietnam Urbanization Review analyzes administrative, physical, economic, demographic, and welfare transitions accompanying the country's rapid urban transformation.
| Barney Cohen | Technology in Society | 2006
The article reviews urbanization across developing countries and identifies infrastructure, poverty, environmental degradation, small-city growth, and weak urban statistics as major sustainability challenges.
| Barney Cohen | World Development | 2004-01
This influential review warns that urban-growth forecasts need to be interpreted carefully and emphasizes the roles of migration, natural population increase, reclassification, and changing definitions of urban areas.
This historical review traces changing approaches to urban policy in developing countries and examines the economic and political debates surrounding city growth.
