smog

In a post on X, the Indian capital's chief minister, Atishi Marlena Singh, said classes will move online until further notice due to a thick smog that has enveloped the city.

Delhi and northern states annually face smog during the winter due to a confluence of dropping temperatures, smoke, dust, low wind speeds, vehicle emissions and crop stubble burning.

The smog is extensive enough to be visible from space.

A few days ago, Nasa shared satellite images of a blanket of smog engulfing parts of northern India and neighbouring Pakistan.

People in India's capital Delhi woke up to a thick layer of smog as the air quality deteriorated to severe levels in the city.