Modern urban cities like New York City, Beijing, Dubai, and Paris are bustling centers of business, entertainment, and trade. However, the modifications humans make to their surroundings in order to urbanize such places can impact the environment in negative ways: pollution, disruption of water flow, deforestation, and desertification.
Explore the effects of urbanization on the environment and help students explore how human cities impact the world around us with this curated collection of resources. This set of classroom ideas addresses worldwide urban growth and how to plan for it. Throughout history, people have been attracted to cities as centers of culture, learning, and economic opportunity. But urbanization also has costs, especially when it happens rapidly.
Join our community of educators and receive the latest information on National Geographic's resources for you and your students. Skip to content. Photograph by Pola Damonte via Getty Images. Twitter Facebook Pinterest Google Classroom. Encyclopedic Entry Vocabulary. Media Credits The audio, illustrations, photos, and videos are credited beneath the media asset, except for promotional images, which generally link to another page that contains the media credit.
Media If a media asset is downloadable, a download button appears in the corner of the media viewer. Text Text on this page is printable and can be used according to our Terms of Service. Interactives Any interactives on this page can only be played while you are visiting our website.
Related Resources. Environment Planet Possible India bets its energy future on solar—in ways both small and big. Environment As the EU targets emissions cuts, this country has a coal problem.
Paid Content How Hong Kong protects its sea sanctuaries. History Magazine These 3,year-old giants watched over the cemeteries of Sardinia. Magazine How one image captures 21 hours of a volcanic eruption. Science Why it's so hard to treat pain in infants. Science The controversial sale of 'Big John,' the world's largest Triceratops. Science Coronavirus Coverage How antivirals may change the course of the pandemic.
Science Coronavirus Coverage U. Travel A road trip in Burgundy reveals far more than fine wine. Travel My Hometown In L. Travel The last artists crafting a Thai royal treasure.
How is an urban area defined? Sweden Built-up areas with inhabitants or more and where houses are at most metres apart. Japan Cities defined as shi. In general, shi refers to a municipality that satisfies the following conditions: 1 50, inhabitants or more; 2 60 per cent or more of the houses located in the main built-up areas; 3 60 per cent or more of the population including their dependents engaged in manufacturing, trade or other urban type of business.
India Statutory places with a municipality, corporation, cantonment board or notified town area committee and places satisfying all of the following three criteria: 1 5, inhabitants or more; 2 at least 75 per cent of male working population engaged in non-agricultural pursuits; and 3 at least inhabitants per square kilometre.
Zimbabwe Places officially designated as urban, as well as places with 2, inhabitants or more whose population resides in a compact settlement pattern and where more than 50 per cent of the employed persons are engaged in non-agricultural occupations.
Singapore Entire population. Uruguay Cities officially designated as such. The European Commission applied a universal definition of settlements across all countries: Urban centre : must have a minimum of 50, inhabitants plus a population density of at least people per square kilometre km 2 or density of build-up area greater than 50 percent. Urban cluster : must have a minimum of 5, inhabitants plus a population density of at least people per square kilometre km 2. Rural : fewer than 5, inhabitants.
Will we ever reach a consensus on urban population? This may, at least, bring us one step closer to agreement on how urban the world really is. Urban slum populations. Just under 1-in-3 urban dwellers live in slum households. From to , for example, the share of the urban population in slum households fell from: 44 to 25 percent in China; 55 to 24 percent in India; 37 to 22 percent in Brazil; 77 to 50 percent in Nigeria.
Urban density. Urban agglomerations. Population in largest city. City populations. Population of the capital city.
Across the world the most common capital size was in the range of 1 to 5 million people. Population of cities. Long-run history of urbanization. Migration to towns and cities is very recent — mostly limited to the past years. How has urbanization changed over longer timescales — over the past years? Future urbanization. By , more than two-thirds of the world will live in urban areas.
By , close to 7 billion people are projected to live in urban areas. How do living standards change as people move to urban areas? Some examples include: in nearly all countries electricity access is higher in urban areas than in rural areas; access to improved sanitation is higher in urban areas; access to improved drinking water is higher in urban areas; access to clean fuels for cooking and heating is higher in urban areas; child malnutrition is lower in urban settings.
UN-HABITAT defines a slum household as a group of individuals living under the same roof in an urban area who lack one or more of the following 23 : 1. Durable housing of a permanent nature that protects against extreme climate conditions. Sufficient living space which means not more than three people sharing the same room.
Easy access to safe water in sufficient amounts at an affordable price. Sometimes a fifth criteria is included: 5. Security of tenure that prevents forced evictions. It usually incorporates the population in a city or town plus that in the suburban areas lying outside of, but being adjacent to, the city boundaries. Whenever possible, data classified according to the concept of urban agglomeration are used. However, some countries do not produce data according to the concept of urban agglomeration but use instead that of metropolitan area or city proper.
If possible, such data are adjusted to conform to the concept urban agglomeration. When sufficient information is not available to permit such an adjustment, data based on the concept of city proper or metropolitan area are used.
Boundaries which could be used to define an urban area, based on the example of Toronto. Data Sources. Data: Historic urban population size; projections of future urbanization trends Geographical coverage: Global, by region and by country Time span: to present; projections to Available at: Online here.
UN-Habitat, Urban Data. Data: Urban populations, urban area, population density, urban conditions Geographical coverage: Global, by region, country and city Time span: Mixed data availability some extend from to projections Available at: Online here. Data: Urban and rural population; share of urban population in slum households Geographical coverage: Global, across all regions and countries Time span: Most metrics available from onwards; some from onwards Available at: Online here.
Wordpress Edit Page. Our World in Data is free and accessible for everyone. Help us do this work by making a donation. Donate now. Built-up areas with inhabitants or more and where houses are at most metres apart. Cities defined as shi. Statutory places with a municipality, corporation, cantonment board or notified town area committee and places satisfying all of the following three criteria: 1 5, inhabitants or more; 2 at least 75 per cent of male working population engaged in non-agricultural pursuits; and 3 at least inhabitants per square kilometre.
It has been issued regularly since with revised estimates and projections of the urban and rural populations for all countries of the world, and of their major urban agglomerations.
Welcome to the United Nations. Population decline in some cities and in rural areas Some cities have experienced population decline in recent years. Sustainable urbanization is key to successful development Understanding the key trends in urbanization likely to unfold over the coming years is crucial to the implementation of the Agenda for Sustainable Development, including efforts to forge a new framework of urban development.
Fill in the fields and click Sign me up or hit Enter to submit your subscription Name. Sign me up! Follow Us.
0コメント