As the smog in Delhi gets thicker, all the primary schools will close due to worsening air quality, officials have announced.

The Indian capital overtook Lahore as the world's most polluted city, with the smog triggering flight diversions.

On Thursday, the smog was so thick, it covered the country's popular tourist destination, the Taj Mahal. The northern parts of the country face these dangerous conditions during the winter months due to a combination of factors including lower temperatures,