The air quality in Delhi remained at alarming levels, fluctuating between very poor and severe categories on Thursday due to unfavorable meteorological conditions impeding the dispersion of pollutants.

Recent findings from a collaborative initiative between the Delhi government and IIT-Kanpur revealed that vehicular emissions were the largest contributor, accounting for approximately 38 percent of the capital's air pollution on Wednesday. This figure is anticipated to rise to 40 percent on Thursday. The second major contributor was identified as secondary inorganic aerosols, comprising particles like sulfate and nitrate formed due to the interaction of gases and particulate pollutants from sources such as power plants, refineries, and vehicles, contributing 30 to 35 percent to the city's air pollution.