. Commuters walk as vehicles move at a traffic signal in New Delhi on Nov. 24.
. In order to fight the air pollution, some New Delhi residents tie handkerchiefs around their mouths and noses and others wear surgical masks. Above, an Indian woman riding a two wheeler has her face covered to protect from pollution as she waits at a traffic signal on Nov. 23.
. Virdhi, 56, wears a scarf on his face to protect from pollution, as he sits near a two wheeler workshop on Nov. 23.
Over the last decade the city's air pollution has grown so rapidly that the cold weather turns the city into a grey, smog-filled health nightmare.
New Delhi’s government announced a slew of measures to curb the air pollution on Dec. 4. These measures are to take effect on the first day of 2016.
While surgical masks protect from larger pollution particles, they do little to filter out smaller PM2.5, the most lethal particulate pollution that can become lodged deep inside the lungs.
. Sitesh Singh, 48, an auto rickshaw driver wears a mask to protect himself from pollution on Nov. 25.
. An Indian woman covers her face from pollution as she waits at a bus station on Nov. 27.
—— NBC News and Associated Press