How Things Work: Smog in North India ; Smog Is an Annual Phenomenon in Northern India during the Winter Months. This Year, However, It Has Descended Much Earlier Than Usual and Is Also Surprisingly Thick, Especially at Night

Through a Smog, Darkly Smog is an annual phenomenon in northern India during the winter months. This year, however, it has descended much earlier than usual and is also surprisingly thick, especially at night. What caused it: The severity of the smog is being attributed to Cyclone Nilam which hit ... (Publication: Business Today)