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.

As air quality index levels reach alarming figures, concerns continue to grow about the impact of pollution on public health and safety.