Delhi was listed as India's most polluted city Thursday as a weeks-long air quality crisis gripping northern India has shown few signs of letting up.

NCR, the Railway Board has introduced staggered work hours for employees, following a government directive. Carpooling is encouraged. With air quality hitting severe levels, measures aim to maintain productivity and efficiency while addressing the environmental health crisis.

With the overall Air Quality Index (AQI) reading 422 at 6 AM on Saturday, Delhi was once again engulfed in a dense layer of poisonous haze as the air quality fell into the "Severe" category. According to the Central Pollution Control Board (CPCB),