South Asia was home to 44 of the world’s top 50 most polluted cities last year, most of them in India, according to the Swiss air quality technology company IQAir. Kandhari said that though she sympathized with residents in New York and elsewhere, “we really hope that the policymakers in the USA, who are in denial, feel the pain of the developing nations who choke each day in this toxic hell.” The world’s most polluted city last year was Lahore, Pakistan, IQAir says. In Bangladesh, whose capital, Dhaka, was the world’s second-most polluted city Thursday, air pollution is responsible for...