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Indian city most polluted in the world

Last updated on: January 18, 2013 10:21 IST

Indian city most polluted in the world

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While pollution is a major problem in almost all cities, some are more polluted than others. According to United States's Environmental Protection Agency's air-quality index, one Indian city tops when it comes to pollution.

Let's take a look at some of the most polluted cities in the world's biggest economies.

Source: The Economist

NOTE: Environmental Protection Agency's air-quality index measures PM 2.5 (particulate matter of 2.5 microns across or less per cubic metre). Such particles are small enough to be inhaled and can damage lungs. The AQI range ends at 500. A reading above 100 is deemed "unhealthy for sensitive groups" and anything above 400 is rated "hazardous" for all, according to The Economist.

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Image: Royal Palace is seen at the end of Karl Johans Gate in Oslo, Norway.
Photographs: Suzanne Plunkett/Reuters

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Ludhiana

Country: India

Particulate matter with diameter of 10 microns or less per cubic metre: 251

Global rank: 1

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Image: A view of Ludhiana, Punjab.
Photographs: Source: Soman/Wikipedia Commons

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Lanzhou

Country: China

Particulate matter with diameter of 10 microns or less per cubic metre: 150

Global rank: 2

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Image: Railway station in Lanzhou, China.
Photographs: Source: Chen Zhao/Wikipedia Commons

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Mexicali

Country: Mexico

Particulate matter with diameter of 10 microns or less per cubic metre: 139

Global rank: 3

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Image: House of Culture in Mexicali, Mexico.
Photographs: Source: Thelmadatter/Wikipedia Commons

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Medan

Country: Indonesia

Particulate matter with diameter of 10 microns or less per cubic metre: 112

Global rank: 4

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Image: Skyline of Medan, Indonesia.
Photographs: Source: Kenrick95/Wikipedia Commons

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Anyang

Country: South Korea

Particulate matter with diameter of 10 microns or less per cubic metre: 68

Global rank: 5

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Image: A view of Anyang from Suri mountain.
Photographs: Source: Hyungyong Kim/Wikipedia Commons
Tags: , South Korea

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Busan

Country: South Korea

Particulate matter with diameter of 10 microns or less per cubic metre: 68

Global rank: 6

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Image: Busan, South Korea.
Photographs: Source: byseaninjapan/Wikipedia Commons

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Johannesburg

Country: South Africa

Particulate matter with diameter of 10 microns or less per cubic metre: 64

Global rank: 7

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Image: Cityscape of Johannesburg in South Africa.
Photographs: Euroluftbild.de Euroluftbild.de/Reuters

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Rio de Janeiro

Country: Brazil

Particulate matter with diameter of 10 microns or less per cubic metre: 62

Global rank: 8

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Image: An aerial view of the famous Christ the Redeemer atop of Corcovado mountain in Rio de Janeiro.
Photographs: Bruno Domingos/Reuters

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Turin

Country: Italy

Particulate matter with diameter of 10 microns or less per cubic metre: 46

Global rank: 9

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Image: A view of rose garden at Palace of Venaria Reale in Turin.
Photographs: Alessandro Garofalo/Reuters

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Seville

Country: Spain

Particulate matter with diameter of 10 microns or less per cubic metre: 44

Global rank: 10

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Image: A souvenir shop in the Andalusian capital of Seville.
Photographs: Marcelo del Pozo/Reuters

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Zaragoza

Country: Spain

Particulate matter with diameter of 10 microns or less per cubic metre: 44

Global rank: 11

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Image: A view of Zaragoza.
Photographs: Source: Wikipedia Commons

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Paris

Country: France

Particulate matter with diameter of 10 microns or less per cubic metre: 38

Global rank: 12

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Image: People skate on an artivicial ice rink across from the Eiffel Tower in Paris.
Photographs: Charles Platiau/Reuters
Tags: , Paris

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Bakersfield, California

Country: The United States

Particulate matter with diameter of 10 microns or less per cubic metre: 38

Global rank: 13

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Image: A view of Bakersfield, California.
Photographs: Source: Bobak Ha'Eri/Wikipedia Commons

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Montreal

Country: Canada

Particulate matter with diameter of 10 microns or less per cubic metre: 36

Global rank: 14

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Image: Montreal Canadiens' hockey team jerseys hang outside a shop in Vieux-Port in Montreal.
Photographs: Jumana El-Heloueh/Reuters

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Moscow

Country: Russia

Particulate matter with diameter of 10 microns or less per cubic metre: 35

Global rank: 15

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Image: A view of Moscow business district.
Photographs: Denis Sinyakov/Reuters

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Dresden

Country: Germany

Particulate matter with diameter of 10 microns or less per cubic metre: 34

Global rank: 16

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Image: A view of Striezelmarkt Christmas market in Dresden.
Photographs: Tobias Schwarz/Reuters

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London

Country: The United Kingdom

Particulate matter with diameter of 10 microns or less per cubic metre: 33

Global rank: 17

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Image: King's Cross station in London.
Photographs: Paul Hackett/Reuters

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Osaka

Country: Japan

Particulate matter with diameter of 10 microns or less per cubic metre: 25

Global rank: 18

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Image: Dotonbori shopping and amusement district in Osaka.
Photographs: Issei Kato/Reuters
Tags: , Osaka , Japan

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Brisbane

Country: Australia

Particulate matter with diameter of 10 microns or less per cubic metre: 18

Global rank: 19


Image: Brisbane River is seen flowing past the skyline of central Brisbane.
Photographs: Mick Tsikas/Reuters

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