Anti-pollution masks

A man wears an anti-pollution mask to protect himself from growing level of air pollution, in New Delhi.
PTI
Delhi's air quality in 'severe plus' category
Delhi's air quality plummeted to the "severe plus" category on Friday morning (November 3). Air quality worsened in Delhi's neighbouring city Ghaziabad, Uttar Pradesh, too.
PTI
What is 'severe plus' category?
Delhi's Air Quality Index (AQI) skyrocketed from 351 at 10 am on Thursday to 471 at 9 am on Friday. If the AQI is more than 300 it is hazardous (Health warning of emergency conditions: everyone is more likely to be affected).
PTI
Delhi schools closed
Delhi schools have been closed for two days due to air pollution.
PTI
Poor visibility in Delhi
The India Meteorological Department (IMD) reported visibility levels of only 500 metres at the Safdarjung Observatory and the Palam Observatory around 10 am.
PTI
Stubble burning in Punjab
A farmer burns stubble to remove paddy crop residues from a field on the outskirts of Amritsar. Surge in farm fires in Punjab and Haryana lead to a spike in the pollution levels in the Delhi-NCR region.
PTI