There are more opportunities to find work in the city than in the countryside. This attracts poor people who want to improve their lives, and create a better future for their children.

lack of housing

newcomers often set up temporary shelters on the outskirts of cities. It is in these temporary shelters that the problems of urbanization arise.

With 25 million inhabitants, Mexico City is the largest city in the world; it's therefore no surprise that it has so much to offer - from intriguing modern attractions to a variety of ancient cultural wonders. The roots of Mexico's capital lie in its historic centre, which is home to a number of museums, galleries and landmarks; visitors can also experience various religious festivities, cultural events and the 'spirit' of the city by spending time wandering through its centre. Some of Mexico City's top attractions include the National Museum of Anthropology, the Templo Mayor and the Catedral Metropolitana, which now dominates the city's main square, the Zacolo. What's more, Mexico City offers an exquisite opportunity for children to partake in its cultural splendour. The Papalote Children's Museum, for example, holds an array of treasures and is one of the most visited scientific museums in the world.

If you're looking for excitement, culture, and perhaps the best margaritas you've ever had, head to Mexico City.

As 'the largest city in the world' Mexico City has more than a bit of excitement in store for you

1 Tokyo Japan 32,450,000 8,014 4,049 2 Seoul South Korea 20,550,000 5,076 4,048 3 Mexico City[2] Mexico 20,450,000 7,346 2,784 4 New York City[3] United States 19,750,000 17,884 1,104 5 Mumbai India 19,200,000 2,350 8,170 6 Jakarta Indonesia 18,900,000 5,100 3,706 7 Sao Paulo Brazil 18,850,000 8,479 2,223 8 Delhi India 18,600,000 3,182 5,845 9 Osaka-Kobe-Kyoto Japan 17,375,000 6,930 2,507 10 Shanghai China 16,650,000 5,177 3,216

Seoul, South Korea: 10,231,217

Largest cities in the world

Largest metropolitan areas Tokyo, Japan: 33,900,000

Tokyo, Japan Current Population: 35.2 million Projected 2025 Population: 36.4 million Annual Growth Rate 2007 to 2025: 0.11%

Tokyo is a major global financial center. Its rail system, the largest in the world, is clean and efficient.

Tokyo's water and electricity capacity is in fine shape for a growing population, experts say

1. Tokyo, Japan Metropolitan area: 34 million people City: 12.5 million people Tokyo is by far the largest urban region in the world. Despite its size and complexity, Tokyo has a very efficient public transportation, which accounts for almost 80 percent of all daily journeys in Tokyo.

1. Tokyo, Japan Metropolitan area: 34 million people City: 12.5 million people Tokyo is by far the largest urban region in the world. Despite its size and complexity, Tokyo has a very efficient public transportation, which accounts for almost 80 percent of all daily journeys in Tokyo. Urban Detail: Tokyo Bay has been gradually filled up to create more space for housing and offices. Odaiba, an island entirely created out of waste material, became one of Tokyo’s most interesting tourist spots with futuristic architecture, shopping, and entertainment centers. (Photo: Miki Yokoyama)

Virtually overnight, Chongqing has become the largest city not only in China but in the world. Territory to the north and west has been annexed, so that the population now encompasses 13.89 million people.[*]

Chongqing, as a result, is a swirling cauldron of noise and smoke as buzzing motorbikes and overloaded buses strain to climb its steep hills.

economic laboratory

112,778,721BombayMumbaiIndia

1. Tokyo (Japan) 34,200,000

57. Houston (US) 5,400,000

400. Thiruvananthapuram (India) 1,000,000

1. Tokyo-Yokohama, Japan - 33,200,000 2. New York, United States - 17,800,000

All population figures for the world's largest urban areas are simply estimates. There's no way to know the exact population of such a large place.

1. Tokyo, Japan - 34,100,000 2. Mexico City, Mexico - 22,650,000

45,539,949HoustonUnited States of America2,016,582

134,997,269TokyoJapan8,124,31012

RankUrban Pop [UN estimate]Urban area/CityCountryCity Pop.Rank

10,231,217

10,009,231*

9,925,891

Tōkyō {Tokyo}13東京都Tōkyō2,10211,829,36311,773,60212,064,10112,576,60112,677,917

Memphis, Egypt3100 BCEWell over 30,000 Akkad, Babylonia (Iraq)2240 Lagash, Babylonia (Iraq)2075 Ur, Babylonia (Iraq)203065,000 Thebes, Egypt1980 Babylon, Babylonia (Iraq)1770 Avaris, Egypt1670 Memphis, Egypt1557 Thebes, Egypt1400 Nineveh, Assyria (Iraq)668 Babylon, Babylonia (Iraq)612First above 200,000 Alexandria320 Pataliputra (Patna), India300 Changan (Xi'an), China195400,000 Rome25450,000 (100 CE) Constantinople (Istanbul), Turkey340 CE400,000 (500) Ctesiphon, Iraq570 Changan (Xi'an), China637400,000 (622); 600,000 (800) Baghdad, Iraq775First over 1 million; 700,000 (800) Cordova, Spain935 Kaifeng, China1013400,000 (1000); 442,000 (1100) Constantinople (Istanbul), Turkey1127 Merv (Mary), Turkmenistan1145200,000 (1150) Constantinople (Istanbul), Turkey1153 Fez (Fes), Morocco1170 Hangzhou, China1180255,000 (1200); 320,000 (1250) Cairo, Egypt1315 Hangzhou, China1348432,000 (1350) Nanking, China1358487,000 (1400) Beijing, China1425600,000 (1450); 672,000 (1500) Constantinople (Istanbul), Turkey1650700,000 (1650 & 1700) Beijing, China1710900,000 (1750); 1.1 million (1800) London, United Kingdom1825First over 5 million; 1.35 million (1825); 2.32 million (1850); 4.241 million (1875); 6.480 million (1900) New York1925First over 10 million; 7.774 million (1925), 12.463 million (1950) Tokyo1965First over 20 million; 23 million (1975)

Chandler utilized a plethora of historical sources to locate approximate populations for the world's largest cities since 3100 BCE.

The truth is both of them have their advantages and disadvantages. It’s up to you! As for me, I love big cities! The big city is the place where all industrial, cultural and educational centers are situated. In big cities you can find museums, theaters, clubs, cinemas, big shops and hospitals, comfortable modern flats. Living in a huge metropolis you’ll never be bored, you can always find something interesting for you.

The truth is both of them have their advantages and disadvantages. It’s up to you! As for me, I love big cities! The big city is the place where all industrial, cultural and educational centers are situated. In big cities you can find museums, theaters, clubs, cinemas, big shops and hospitals, comfortable modern flats. Living in a huge metropolis you’ll never be bored, you can always find something interesting for you.

The truth is both of them have their advantages and disadvantages. It’s up to you! As for me, I love big cities! The big city is the place where all industrial, cultural and educational centers are situated. In big cities you can find museums, theaters, clubs, cinemas, big shops and hospitals, comfortable modern flats. Living in a huge metropolis you’ll never be bored, you can always find something interesting for you.