Increasing air pollution in many of the world’s poorest cities is driving up the risk of stroke, heart disease and lung cancer in some of the most-vulnerable populations, according to a report Thursday from the World Health Organization.
Global urban air pollution rose 8 percent from 2008 to 2013, and nearly all 300 cities in low- and middle-income nations included in the study had air-quality levels below World Health Organization standards. About half the cities in wealthy countries, primarily in Europe and the Americas, had excessive pollution.
