Residents in India's northern states woke up to another day of poor air quality on Tuesday, as a layer of dense fog shrouded most of the region, and pollution in the capital Delhi remained severe. India battles air pollution every winter as cold,

India's capital city of Delhi has virtually shut down as air pollution hit "severe plus" levels, according to Indian government officials in its pollution control authority.

Residents of Delhi woke up to a thick blanket of toxic smog, prompting the city to cancel in-person classes, halt construction and limit traffic, as the Indian capital city's air-pollution levels surged past 60 times the World Health Organization's ...