Photographs: Daniel Berehulak/Getty Images
About 52 per cent of the world's population currently live in urban areas; by 2025 this should increase to 58 per cent, says The Economist.
Nearly all this growth will take place in emerging-market economies, particularly Asia, as migrants from the countryside move in search of jobs, it says.
Let's have a look at some of the fastest-growing cities in the developing world.
NOTE: Courtesy, The Economist
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3 cities in India among the fastest growing
Image: Tourists visit the The Bahai House of Worship known as the 'Lotus Temple' in New Delhi.Photographs: Cameron Spencer/Getty Images
New Delhi
Country: India
Annual average population increase (1995-2010): 640,000
Projected population increase (2010-2025): 410,000
Population in 2010: 22.2 million
Rank: 1
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3 cities in India among the fastest growing
Image: A commuter jumps between cars on a train at the Kamalapur Railway Station, the largest in the country, in Dhaka, Bangladesh.Photographs: Spencer Platt/Getty Images
Dhaka
Country: Bangladesh
Annual average population increase (1995-2010): 410,000
Projected population increase (2010-2025): 408,000
Population in 2010: 14.6 million
Rank: 2
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3 cities in India among the fastest growing
Image: The first sighting of Mountain Gorilla babies in Bukima, Congo.Photographs: Brent Stirton/Getty Images
Kinshasa
Country: Congo
Annual average population increase (1995-2010): 280,000
Projected population increase (2010-2025): 410,000
Population in 2010: 8.8 million
Rank: 3
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3 cities in India among the fastest growing
Image: A visitor poses for a picture in front of Taj Mahal hotel in Mumbai.Photographs: Arko Datta/Reuters
Mumbai
Country: India
Annual average population increase (1995-2010): 396,000
Projected population increase (2010-2025): 380,000
Population in 2010: 20 million
Rank: 4
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3 cities in India among the fastest growing
Image: A man sells spices at a market in Karachi.Photographs: Athar Hussain/Reuters
Karachi
Country: Pakistan
Annual average population increase (1995-2010): 370,000
Projected population increase (2010-2025): 310,000
Population in 2010: 13.1 million
Rank: 5
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3 cities in India among the fastest growing
Image: Children playing soccer are silhouetted at sunset in Nigeria's main city of Lagos, Nigeria.Photographs: George Esiri/Reuters
Lagos
Country: Nigeria
Annual average population increase (1995-2010): 305,000
Projected population increase (2010-2025): 350,000
Population in 2010: 10.6 million
Rank: 6
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3 cities in India among the fastest growing
Image: A horse-cart passes in front of the Queen Victoria Memorial in Kolkata.Photographs: Jayanta Shaw/Reuters
Kolkata
Country: India
Annual average population increase (1995-2010): 240,000
Projected population increase (2010-2025): 301,000
Population in 2010: 15.6 million
Rank: 8
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3 cities in India among the fastest growing
Image: Visitors walk through the Lujiazui Financial Area in Shanghai.Photographs: Aly Song/Reuters
Shanghai
Country: China
Annual average population increase (1995-2010): 430,000
Projected population increase (2010-2025): 230,000
Population in 2010: 16.6 million
Rank: 9
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3 cities in India among the fastest growing
Image: Tourists ride on a 'Kalesa', a horse-drawn carriage, in Manila's historic Intramuros also known as Walled City.Photographs: Erik de Castro/Reuters
Manila
Country: The Philippines
Annual average population increase (1995-2010): 140,000
Projected population increase (2010-2025): 230,000
Population in 2010: 16.6 million
Rank: 9
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3 cities in India among the fastest growing
Image: A paratrooper performs in Lahore.Photographs: Mohsin Raza/Reuters
Lahore
Country: Pakistan
Annual average population increase (1995-2010): 170,000
Projected population increase (2010-2025): 205,000
Population in 2010: 7.1 million
Rank: 10
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3 cities in India among the fastest growing
Image: Houses are seen at the foot of Mount Kilimanjaro in Tanzania's Hie district.Photographs: Katrina Manson/Reuters
Dar es Salaam
Country: Tanzania
Annual average population increase (1995-2010): 190,000
Projected population increase (2010-2025): 105,000
Population in 2010: 3.3 million
Rank: 11
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3 cities in India among the fastest growing
Image: An aerial view show Ho Chi Minh City.Photographs: Nguyen Huy Kham/Reuters
Ho Chi Minh City
Country: Vietnam
Annual average population increase (1995-2010): 140,000
Projected population increase (2010-2025): 180,000
Population in 2010: 6.2 million
Rank: 12
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3 cities in India among the fastest growing
Image: Men ride camels near the site of 44 Nubian pyramids of kings and queens in the ruins of the ancient city of Meroe next to Begrawiya, near Shendi in the River Nile state of Sudan.Photographs: Mohamed Nureldin Abdallah/Reuters
Khartoum
Country: Sudan
Annual average population increase (1995-2010): 120,000
Projected population increase (2010-2025): 180,000
Population in 2010: 5.2 million
Rank: 13
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3 cities in India among the fastest growing
Image: A hippopotamus yawns at sunset in Kenya's Tsavo West National Park, 280km east of Kenya's capital Nairobi.Photographs: Noor Khamis/Reuters
Nairobi
Country: Kenya
Annual average population increase (1995-2010): 110,000
Projected population increase (2010-2025): 190,000
Population in 2010: 3.5 million
Rank: 14
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3 cities in India among the fastest growing
Image: A view of the city skyline from the Zhongfu Building at night in Beijing.Photographs: Jason Lee/Reuters
Beijing
Country: China
Annual average population increase (1995-2010): 270,000
Projected population increase (2010-2025): 170,000
Population in 2010: 12.4 million
Rank: 15
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