Delhi Has World’s Most Toxic Air on Farm Fires and Lack of Wind

Delhi Metro trains in smog near Yamuna Bank in New Delhi, India, on Oct. 19. 

Photographer: Hindustan Times/Hindustan Times/Getty Images

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India’s capital has recorded the world’s most toxic air as seasonal fires to clear farmland added to pollution from vehicles, construction and coal-fired power plants.

New Delhi’s air quality index climbed to as high as 346 early on Monday, the most among 110 global cities tracked by Swiss company IQ Air. The same reading in Mumbai rose to as high as 177.