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believed to live in slums, almost one-third of

      the urban population.

      • Mexico City sits on a

      drained lake-bed of

      saturated clay that is

      subsiding as it continues

      to dry: in 100 years, parts

      of the city have sunk

      about 9 metres.

      • Its metro system is the

      world’s fourth largest and

      cheapest to use.

      Mexico City

      Comparative wealth of city dwellers

      Number of hours someone needed to work

      for the average city wage in order to buy

      an iPod Nano (8GB version) in 2009

      New York

      9 hours

      Tokyo

      12 hours

      London

      11 hours

      Paris

      15 hours

      • About 45% of New

      Yorkers speak a

      language other than

      English at home.

      • The urban legend of

      alligators in Manhattan

      sewers grew in the

      1960s based on a

      colourful account

      by a retired

      city official.

      New York

      • More than 300 languages are

      spoken in London.

      • It has the world’s oldest and

      second most extensive

      underground railway network.

      • 20% of Parisians were

      born outside France.

      • The city receives 28 million

      tourists a year, 17 million

      from outside France.

      London

      Paris

      • Lagos has no overall city

      administration.

      • The city population is

      growing at the rate of

      1 new person every

      2 minutes.

      Lagos

      São Paulo

      • “Sampa” is the

      world’s largest Japanese

      city outside Japan, the

      largest Spanish city outside

      Spain, the largest Lebanese

      city outside Lebanon.

      São Paulo

      46.5 hours

      Istanbul

      56 hours

      Shanghai

      56.5 hours

      Q 32 Urbanization

      34

      • Istanbul has 18% of

      Turkey’s population and

      produces over 25% of

      national GDP.

      • Its population grew

      tenfold in the second half

      of the 20th century.

      Population density: people per square kilometre:

      20,000 or more

      10,000 – 19,999

      6,000 – 9,999

      Size of metropolitan area:

      Cities around the world

      2011 or most recent data

      metro area =1,000 km2

      (outer ring)

      3,000 – 5,999

      fewer than 3,000

      city area =100 km2

      (inner ring)

      • Shanghai has the

      world’s most extensive

      underground railway

      network.

      • It has the world’s

      busiest container port.

      • The Shanghai Stock

      exchange ranks third in

      the world by trading

      volume.

      • 99% of residents are

      Han Chinese.

      • 16 major languages

      are widely spoken in

      Mumbai.

      • With less than 2% of

      India’s population,

      Mumbai pays over 33%

      of its taxes.

      • About half of residents

      live in unregistered

      accommodation and lack

      sanitation.

      • As Pakistan’s financial and

      commercial capital, Karachi

      contributes 25% of national tax

      revenue.

      • The city’s population grows at

      the rate of 1 person a minute.

      Tehran

      Istanbul

      Cairo

      Shanghai

      Tokyo

      • 99% of Tokyo’s

      population is Japanese by

      birth.

      • 40% of the city is built

      on landfill.

      Mumbai

      • Tehran’s population has grown

      fivefold in 50 years.

      • Air pollution (80% cars, 20%

      industrial) kills about 10,000

      people a year; in 2006, 3,600

      died in the month of October

      alone.

      Jakarta

      • Almost 20% of Cairo’s

      buildings date from

      1997 or later.

      • 60% of the

      population is aged

      under 30.

      • Up to 25,000

      people a year die

      from air pollution.

      • 40% of Jakarta is below sea

      level.

      • At least 35% and

      perhaps as many as

      80%

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