Air quality in cities worldwide fails to meet World Health Organization guidelines for safe levels, putting millions at greater risk of respiratory disease, lung cancer and other serious, long-term health problems, the health agency said, and releasing new data this week. About half the residents of reporting cities are exposed to air pollution at least 2.5 times higher than World Health Organization Air Quality Guideline levels. Only one in every eight people living in reporting cities breathes air that complies with the levels WHO recommends. Smoggy Seoul, South Korea (Photo by Scott Derringer) “Too many urban centers today are so enveloped in dirty air that their skylines are invisible,” said Dr. Flavia Bustreo, WHO assistant director-general for family, children and women’s health. “Not surprisingly, this air is dangerous to breathe. So a growing number of cities and communities worldwide are striving to better meet the needs of their residents – in particular children and the elderly.”

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