TOPSHOT - An Indian man walks in the woods surrounded by fog and smoke from burning vegetation in Jalandhar on November 30, 2018. - Smog levels spike during winter in northern India, when air quality often eclipses the World Health Organization's safe levels. Cooler air traps pollutants -- such as from burning garbage dumps, vehicles, construction sites and farmers burning crops -- close to the ground. (Photo by Shammi MEHRA / AFP)