What level of air pollution makes it unsafe to exercise outdoors?
For the second day in a row, air pollution in Delhi was declared serious on Friday, with the 24-hour average AQI (Air Quality Index) reaching a maximum of 475 at 11 am and remaining above 450 until at least 5 pm. (Express photo by Amit Mehra) Good (0-50): Air quality… Continue Reading What level of air pollution makes it unsafe to exercise outdoors?