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Global city. New York City (top) and London (bottom) are the only two cities ranked in the Alpha ++ category by the Globalization and World Cities Research Network. Both cities are considered leading financial, commercial and cultural centers. A global city[a] is a city that serves as a primary node in the global economic network.
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.
A city-state is an independent sovereign city which serves as the center of political, economic, and cultural life over its contiguous territory. [1] They have existed in many parts of the world since the dawn of history, including cities such as Rome, Carthage, Athens and Sparta and the Italian city-states during the Middle Ages and Renaissance, such as Florence, Venice, Genoa and Milan.
Greater Tokyo in Japan, the world's most populated urban area, with about 40 million inhabitants as of 2022 Jakarta, the largest metropolitan city in Indonesia, can be seen the view from the Gelora Bung Karno Sports Complex Greater São Paulo at night, as seen from the International Space Station Greater Melbourne at night, as seen from the International Space Station Warsaw metropolitan area
A smart city is an urban area that uses digital technology to collect data and to operate/provide services. [1][2] Data can be collected from citizens, devices, buildings, cameras. Applications include traffic and transportation systems, [3] power plants, utilities, urban forestry, [4] water supply networks, waste disposal, criminal ...
Main article: Metropolitan area. Tokyo, the world's largest city and metropolitan area. A city can be defined by the inhabitants of its demographic population, as by metropolitan area, or labour market area. UNICEF defines metropolitan area as follows: A formal local government area comprising the urban area as a whole and its primary commuter ...
The Phoenician trading empire, flourishing around the turn of the first millennium BC, encompassed numerous cities extending from Tyre, Sidon, and Byblos, across the Mediterranean to Carthage (in modern Tunisia) and Cádiz (in modern Spain). The name of Melqart, an important Phoenician deity, comes from M-L-K and Q-R-T, meaning "king" and "city".
Climate change andsociety. An eco-city or ecocity is "a human settlement modeled on the self-sustaining resilient structure and function of natural ecosystems", as defined by Ecocity Builders (a non-profit organization started by Richard Register, who first coined the term). [1] Simply put, an eco-city is an ecologically healthy city.