Northern India encountered the recurring annual pre-winter event of air emergency where the Air Quality Index (AQI) readings of main pollutant PM 2.5 breached the 400-mark of “very poor” and landed the air of Delhi, Punjab and other northern cities into the “hazardous” category.

GRAP stage 3 will come into force at 8am on Friday. The Delhi government announced that classes for primary schools will be shifted to online.

A study by the Centre for Science and Environment reveals that vehicular emissions are the largest contributor to Delhi's air pollution, accounting for 51.5 per cent of the city's pollution

Delhi residents woke up to ‘severe’ air quality on Thursday morning (November 14), a day after the national capital recorded the worst AQI in the country, with dense fog blanketing the NCR, reducing visibility.

On Thursday morning, Delhi's air quality hit severe levels, with AQI readings reaching as high as 473 in some areas. Despite the hazardous level, the CAQM opted to monitor conditions further before implementing Stage 3 of the Graded Response Action Plan (GRAP).

Delhi recorded 'severe' air quality for a second consecutive day on Thursday as dense fog continued to shroud the city along with other parts of north India. Most of the stations in the national capital logged AQI well above the 400 mark,