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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...)

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Old Town and Center skyline

Sarajevo (/ˌsærəˈjeɪvoʊ/ SARR-ə-YAY-voh) is the capital and largest city of Bosnia and Herzegovina, with a population of 275,524 in its administrative limits. The Sarajevo metropolitan area including Sarajevo Canton, East Sarajevo and nearby municipalities is home to 555,210 inhabitants. Located within the greater Sarajevo valley of Bosnia, it is surrounded by the Dinaric Alps and situated along the Miljacka River in the heart of the Balkans, a region of Southeastern Europe.

Sarajevo is the political, financial, social, and cultural center of Bosnia and Herzegovina and a prominent center of culture in the Balkans. It exerts region-wide influence in entertainment, media, fashion, and the arts. Due to its long history of religious and cultural diversity, Sarajevo is sometimes called the "Jerusalem of Europe" or "Jerusalem of the Balkans". It is one of a few major European cities to have a mosque, Catholic church, Eastern Orthodox church, and synagogue within the same neighborhood. It is also home to the former Yugoslavia's first institution of tertiary education in the form of an Islamic polytechnic, today part of the University of Sarajevo. (Full article...)

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... that floods across New York City in September 2023 allowed a sea lion to escape her enclosure at the Central Park Zoo?
... that a guerrilla garden established atop an abandoned railroad in Long Island City became legally recognized by the MTA?
... that the African Union has set up a space agency in a Space City?
... that the New York City-based fashion label Sandy Liang is inspired by grandmothers in Chinatown, and often features Liang's own grandmother as a model?
... that one critic likened the design of 185 Montague Street in New York City to the horns of Count Basie's orchestra?
... that New York City's Soldiers' and Sailors' Arch once had a puppet library?

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Jamestown is the capital city of the British Overseas Territory of Saint Helena, Ascension and Tristan da Cunha, located on the island of Saint Helena in the South Atlantic Ocean. It is also the historic main settlement of the island and is on its north-western coast. Before the development of the port at Rupert's Bay, it was the island's only port and the centre of the island's road and communications network. It was founded when colonists from the English East India Company settled on the island in 1659 and was briefly occupied by the Dutch East India Company in 1673 before being recaptured. Many of the buildings built by the East India Company in the 18th century survive and give the town its distinctive Georgian flavour.

The city briefly hosted Napoleon in 1815 during his exile on St. Helena and later served as a base for the Royal Navy's efforts to suppress the slave trade. It had no role during the First World War and only played a minor role during the Second World War. (Full article...)

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'Climate change and cities are deeply connected. Cities are one of the greatest contributors and likely best opportunities for addressing climate change. Cities are also one of the most vulnerable parts of the human society to the effects of climate change, and likely one of the most important solutions for reducing the environmental impact of humans. The UN projects that 68% of the world population will live in urban areas by 2050. In the year 2016, 31 mega-cities reported having at least 10 million in their population, 8 of which surpassed 20 million people. However, secondary cities - small to medium size cities (500,000 to 1 million) are rapidly increasing in number and are some of the fastest growing urbanizing areas in the world further contributing to climate change impacts.' Cities have a significant influence on construction and transportation—two of the key contributors to global warming emissions. Moreover, because of processes that create climate conflict and climate refugees, city areas are expected to grow during the next several decades, stressing infrastructure and concentrating more impoverished peoples in cities.High density and urban heat island effect are examples of weather changes that impact cities due to climate change. It also causes exacerbating existing problems such as air pollution, water scarcity, and heat illness in metropolitan areas. Moreover, because most cities have been built on rivers or coastal areas, cities are frequently vulnerable to the subsequent effects of sea level rise, which cause flooding and erosion; these effects are also connected with other urban environmental problems, such as subsidence and aquifer depletion. (Full article...)

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Image 1A map showing the world energy consumption per capita based on 2013 data from the World Bank. (from Urban geography)
Image 2Extent and major sites of the Indus Valley civilization of ancient India (from History of cities)
Image 3Cain founding the city of Enoch (from History of cities)
Image 4View of the Agora of Athens with the temple of Hephaestus to the left and the Stoa of Attalos to the right (from History of cities)
Image 5The Avenue of the Dead in Teotihuacan originates with the Pyramid of the Moon, forming the basis of the city grid. (from History of cities)
Image 6The "Great Colonnade" marks the cardo maximus of Apamea, Syria. (from History of cities)
Image 7Constantinople, the largest and wealthiest city in Europe from the 9th through the 12th century (from History of cities)
Image 8Mohenjo-daro, a World Heritage Site that was part of the Indus Valley civilization (from History of cities)
Image 9This woodcut shows Nuremberg as a prototype of a flourishing and independent city in the 15th century. (from History of cities)
Image 10The Round city of Baghdad, the capital of Iraq (from History of cities)
Image 11Gdańsk in the 17th century (from History of cities)
Image 12Daily life of people from the Song period at the capital, Bianjing, today's Kaifeng (from History of cities)
Image 13Aerial photograph shows the remains of the Sumerian city Ur, near Nasiriyah, Iraq. (from History of cities)
Image 14The city of Arbil in the Kurdistan Region of Iraq has a radial urban structure centred on an ancient fortress (from Urban structure)
Image 15Excavated foundations of Çatalhöyük, Turkey. An Anatolian town dated to 7000 BCE. (from History of cities)
Image 16A poster from the EPA entitled "Soak Up the Rain with Green Infrastructure." The poster depicts various green infrastructure that can be effective in preventing floods. (from Urban geography)
Image 17New York City, one of the largest urban areas in the world (from Urban geography)
Image 18Glasgow slum in 1871 (from History of cities)
Image 19Palmanova, Italy, constructed in 1593 according to the defensive ideal of the star fort, today retains its distinctive geometry. (from History of cities)

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v t e Cities
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Urban government	City status Municipality direct-controlled Independent city City-state Autonomous city Capital city
Urban economics	World's cities by GDP Global city Central business district Most expensive cities Cheapest cities Most livable cities Urban decay Urban renewal Municipal bond Habitat III
Urban planning	History of urban planning Theories of urban planning Technical aspects of urban planning Urban planners Zoning Mixed-use development Urban design Grid plan Concentric zone model Sector model Multiple nuclei model Linear city Land use Smart city
Urban population	World's largest cities throughout history Most densely populated cities Most populous national capitals Most populous satellite cities
Urbanism	Urban warfare Urban studies Urban morphology Urban culture Urban sociology Anti-urbanism Urban exploration Urban homesteading Unitary urbanism
Environment	Climate change Green urbanism Sustainable city Sustainable urbanism Sustainable Development Goal 11 Urban heat island Urban ecology

v t e World's largest cities
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Metropolitan area	Americas (North South West Indies) Europe (European Union Nordic) Asia Africa Middle East
Urban area/agglomeration	Asia Africa Europe European Union Nordic North America Oceania Transborder
Historical	World Europe
Related articles	Arcology Ecumenopolis Global city Megacity Megalopolis Conurbation Satellite city population Primate city Secondary city