TehranTehran (tɛəˈræn,_-ˈrɑːn,_ˌteɪ-; Tehrân tehˈɾɒːn) is the capital and most populous city of Iran, capital of Tehran province and Tehran county. Tehran city had a population of 9,039,000 in the estimate of 2022 and according to the 2018 estimate of the United Nations, it is the 34th most populous city in the world and the most populous city in West Asia, Tehran metropolis is also the second most populated metropolis in the Middle East.
ChongqingChongqing (ˌtʃɒŋˈtʃɪŋ or ˈtʃɒŋtʃɪŋ ; ; Sichuanese pronunciation: tshoŋ˨˩tɕhin˨˩˦, Standard Mandarin pronunciation: AUDChongqing.oggchong2.qing4), alternately romanized as Chungking (ˈtʃʊŋˈkɪŋ), is one of the four direct-administered municipalities of the People's Republic of China (PRC). Geographically, Chongqing is strategically positioned as a gateway to China's west, a key connection in the Yangtze River Economic Belt, and a strategic base for China's Belt and Road Initiative.
WuhanWuhan (wuːˈhaen, USalsowuːˈhɑːn,_'wu:-; ; AUDzh-Wuhan.oggwu 3.han4) is the capital of Hubei Province in the People's Republic of China. It is the largest city in Hubei and the most populous city in Central China, with a population of over eleven million, the ninth-most populous Chinese city and one of the nine National Central Cities of China. The name "Wuhan" came from the city's historical origin from the conglomeration of Wuchang, Hankou, and Hanyang, which are collectively known as the "Three Towns of Wuhan" ().
São PauloSão Paulo (ˌsaʊ_ˈpaʊloʊ, sɐ̃w ˈpawlu; literally 'Saint Paul') is the most populous city in Brazil and the capital of the state of São Paulo. Listed by the GaWC as an alpha global city, São Paulo is the most populous city outside of Asia and the world's 4th largest city proper by population. Additionally, São Paulo is the largest Portuguese-speaking city in the world. It exerts strong international influences in commerce, finance, arts and entertainment. The city's name honors the Apostle, Saint Paul of Tarsus.
MegalopolisA megalopolis (ˌmɛgəˈlɒpəlɪs) or a supercity, also called a megaregion, is a group of metropolitan areas which are perceived as a continuous urban area through common systems of transport, economy, resources, ecology, and so on. They are integrated enough that coordinating policy is valuable, although the constituent metropolises keep their individual identities. The megalopolis concept has become highly influential as it introduced a new, larger scale thinking about urban patterns and growth.
Urban sprawlUrban 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 urban planning. In addition to describing a special form of urbanization, the term also relates to the social and environmental consequences associated with this development.
LagosLagos (ˈleɪɡɒs ; also US: ˈlɑːgoʊs ;Èkó) or Lagos City is the most populous city in Nigeria, with an estimated population of 21 million in 2015. The estimated population for Lagos was more than 26 million in 2023; and around 30 million for the Lagos metropolitan area. Lagos is the most populous urban area in Africa. Lagos was the national capital of Nigeria until December 1991 following the government's decision to move their capital to Abuja in the centre of the country.
JohannesburgJohannesburg (dʒoʊˈhænᵻsbɜːrɡ , USalso-ˈhɑːn- , juəˈɦanəsbœrχ; Zulu and eGoli ɛˈɡɔːli) (colloquially known as Jozi, Joburg, Jo'burg or "The City of Gold") is the most populous city in South Africa, classified as a megacity; it is one of the 100 largest urban areas in the world. According to Demographia, the Johannesburg–Pretoria urban area (combined because of strong transport links that make commuting feasible) is the 26th-largest in the world in terms of population, with 14,167,000 inhabitants.
Lima metropolitan areaThe Lima Metropolitan Area (Área Metropolitana de Lima, also known as Lima Metropolitana) is an area formed by the conurbation of the Peruvian provinces of Lima (the nation's capital) and Callao. It is the largest of the metropolitan areas of Peru, the seventh largest in the Americas, the fourth largest in Latin America, and among the thirty largest in the world. The conurbation process started to be evident in the 1980s. The metropolitan area is composed of five subregions.
Primate cityA primate city is a city that is the largest in its country, province, state, or region, and disproportionately larger than any others in the urban hierarchy. A primate city distribution is a rank-size distribution that has one very large city with many much smaller cities and towns, and no intermediate-sized urban centers: a king effect, visible as an outlier on an otherwise linear graph, when the rest of the data fit a power law or stretched exponential function.
