Environment News Service: 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, 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...