While the concentration of suspended particulate matter tinier than 1.5 microns (PM2.5) is closely monitored, these toxic ...

A thick, grey smog has blanketed Kathmandu Valley and much of Nepal, turning the air acrid and the sky an unnatural shade of ...

As the drone takes off, the skyline of Kathmandu is shrouded in a thick layer of polluted haze that has been lingering for weeks. Visibility has also dropped over the weeks, delaying the flights. On ...