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New Delhi tops list of cities with dirtiest air

India's capital, New Delhi, has the worst air quality of any city in the world, according to figures published by the World Health Organisation.

The WHO measured the average levels of harmful particles known as PM2.5s to try to gauge which urban areas had the most dangerous pollution levels.

Smog obscures the view of the India Gate monument in New Delhi. Credit: Associated Press

Indian cities occupied the top four places on the global list, and 13 out of the top 20 dirtiest cities.

There were three Pakistani cities in the top 20, along with the Qatari capital, Doha and cities in Iran, Turkey and Bangladesh.

Pollution report 'shows need for more cycling'

The UK's governing body for cycling has said high levels of air pollution in some British cities are further evidence of the need to expand cycling.

It follows a study from the World Health Organisation that found nine British cities and towns had unsafe levels of air pollution.

British Cycling is calling for more investment in cycling infrastructure. Credit: John Stillwell/PA Wire/Press Association Images

Martin Key, campaigns manager for British Cycling, said: "With almost daily news stories about worrying levels of air pollution, it is clearer than ever that more cycling is the answer to many of the problems we face in Britain today."

"If local and national government put sustained and targeted investment into improving our roads and making them fit for cycling, we will without doubt create healthier, happier communities and more pleasant places to live," he added.

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