A person warms himself near a fire sitting next to cows in Prayagraj, India, Monday, Dec. 30, 2019. Opaque, chilly smog blanketed northern India on Monday as low temperatures collided with hazardous levels of air pollution. Across many cities in the region, including New Delhi, the capital, visibility was reduced to 200 meters (218 yards), according to the India Meteorological Department. (AP Photo/Rajesh Kumar Singh), APTOPIX