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Mexico City is the capital and largest city in Mexico. It is also one of the most populous and polluted cities in the world. The Aztec people were here before the Spanish came and made Mexico City. It was founded in 1521 by Hernán Cortés. Today, about 8.5 million people live in the city, and about 18 million live in the Greater Mexico City urban area. The city of Mexico City ceased to exist in 1928. Since then, there is only the Federal District.
Mexico City its divided by 16 boroughs: Álvaro Obregón, Azcapotzalco, Benito Juarez, Coyoacán, Cuajimalpa, Cuauhtémoc, Gustavo A. Madero, Iztacalco, Iztapalapa, Magdalena Contreras, Miguel Hidalgo, Milpa Alta, Tláhuac, Tlalpan, Venustiano Carranza and Xochimilco.
Mexico City was originally built on a lake, Lake Texcoco, which is now mostly drained. The ecology of the area has been much changed by the draining. Many of its native species, such as the Axolotl, are extinct, or in danger.
- "Largest Cities of the World - by population". worldatlas.com. http://www.worldatlas.com/citypops.htm. Retrieved 2008-10-22. Including population within the recognized metro area of the city and also people living in the immediate surrounding area outside of the established border of the city the most populated cities in the world are: 1. Tokyo, Japan - 28,025,000, 2. Mexico City - 18,131,000, 3. Mumbai, India - 18,042,000, 4. São Paulo, Brazil - 17, 711,000, 5. New York City, USA - 16,626,000.