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Portal:Cities

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The Cities Portal

The city of Erbil in Kurdistan has a radial urban structure centred on an ancient fortress.

A city is a human settlement of a substantial size. The term "city" has different meanings around the world and in some places the settlement can be very small. Even where the term is limited to larger settlements, there is no universally agreed definition of the lower boundary for their size. In a narrower sense, a city can be defined as a permanent and densely populated place with administratively defined boundaries whose members work primarily on non-agricultural tasks. Cities generally have extensive systems for housing, transportation, sanitation, utilities, land use, production of goods, and communication. Their density facilitates interaction between people, government organizations, and businesses, sometimes benefiting different parties in the process, such as improving the efficiency of goods and service distribution.

Historically, city dwellers have been a small proportion of humanity overall, but following two centuries of unprecedented and rapid urbanization, more than half of the world population now lives in cities, which has had profound consequences for global sustainability. Present-day cities usually form the core of larger metropolitan areas and urban areas—creating numerous commuters traveling toward city centres for employment, entertainment, and education. However, in a world of intensifying globalization, all cities are to varying degrees also connected globally beyond these regions. This increased influence means that cities also have significant influences on global issues, such as sustainable development, climate change, and global health. Because of these major influences on global issues, the international community has prioritized investment in sustainable cities through Sustainable Development Goal 11. Due to the efficiency of transportation and the smaller land consumption, dense cities hold the potential to have a smaller ecological footprint per inhabitant than more sparsely populated areas. Therefore, compact cities are often referred to as a crucial element in fighting climate change. However, this concentration can also have some significant negative consequences, such as forming urban heat islands, concentrating pollution, and stressing water supplies and other resources. (Full article...)

Brisbane (/ˈbrɪzbən/ BRIZ-bən, Turrbal/Yagara: Meanjin, Meaanjin, Maganjin or Magandjin) is the capital and largest city of the state of Queensland and the third-most populous city in Australia, with a population over 2.7 million. Brisbane lies at the centre of South East Queensland, an urban agglomeration with a population of approximately 4 million which includes several other regional centres and cities. The central business district is situated within a peninsula of the Brisbane River about 15 km (9 mi) from its mouth at Moreton Bay. Brisbane is located in the hilly floodplain of the Brisbane River Valley between Moreton Island and the Taylor and D'Aguilar mountain ranges. It sprawls across several local government areas, most centrally the City of Brisbane. The demonym of Brisbane is Brisbanite.

The Moreton Bay penal settlement was founded in 1824 at Redcliffe as a place for secondary offenders from the Sydney colony, but in May 1825 moved to North Quay on the banks of the Brisbane River, so named for British army general and Governor of New South Wales Sir Thomas Brisbane. German Lutherans established the first free settlement of Zion Hill at Nundah in 1838, and in 1859 Brisbane was chosen as Queensland's capital when the state separated from New South Wales. By the late 19th century, the city had grown into a major port and centre of immigration. During World War II, the Allied command in the South West Pacific was based in the city, along with the headquarters for General Douglas MacArthur of the United States Army. (Full article...)

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The ruins of Palmyra in 2010

Palmyra (/pælˈmrə/ pal-MY-rə; Palmyrene: 𐡶𐡣𐡬𐡥𐡴‎ (), romanized: Tadmor; Arabic: تَدْمُر, romanizedTadmur) is an ancient city in central Syria. It is located in the eastern part of the Levant, and archaeological finds date back to the Neolithic period, and documents first mention the city in the early second millennium BCE. Palmyra changed hands on a number of occasions between different empires before becoming a subject of the Roman Empire in the first century CE. (Full article...)

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A typical suburban development in the United States, located in Chandler, Arizona

Urban sprawl (also known as suburban sprawl or urban encroachment) is defined as "the spreading of urban developments (such as houses and shopping centers) on undeveloped land near a city". Urban sprawl has been described as the unrestricted growth in many urban areas of housing, commercial development, and roads over large expanses of land, with little concern for very dense urban planning. Sometimes the urban areas described as the most "sprawling" are the most densely populated. In addition to describing a special form of urbanization, the term also relates to the social and environmental consequences associated with this development. In modern times some suburban areas described as "sprawl" have less detached housing and higher density than the nearby core city. Medieval suburbs suffered from the loss of protection of city walls, before the advent of industrial warfare. Modern disadvantages and costs include increased travel time, transport costs, pollution, and destruction of the countryside. The revenue for building and maintaining urban infrastructure in these areas are gained mostly through property and sales taxes. Most jobs in the US are now located in suburbs generating much of the revenue, although a lack of growth will require higher tax rates.

In Europe, the term peri-urbanisation is often used to denote similar dynamics and phenomena, but the term urban sprawl is currently being used by the European Environment Agency. There is widespread disagreement about what constitutes sprawl and how to quantify it. For example, some commentators measure sprawl by residential density, using the average number of residential units per acre in a given area. Others associate it with decentralization (spread of population without a well-defined centre), discontinuity (leapfrogging development, as defined below), segregation of uses, and so forth. (Full article...)

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