Watch: Taj Mahal barely visible as thick smog cover Agra due to pollution

The iconic Taj Mahal was hardly visible on Monday morning as a thick layer of smog covered Agra due to a rise in pollution levels. Only a faint outline of the monument was visible.

According to the Central Pollution Control Board, the air quality index of Agra at 11 am was 191, which is in the moderate category.

Along with Delhi, several cities in Haryana, Rajasthan, and Uttar Pradesh have reported hazardous air quality.

Ghaziabad (413), Gurugram (369), Noida (403), Greater Noida (396) and Faridabad (426) also reported hazardous air quality at 7 am on Monday morning.

GRAP categorises actions into four stages: Stage I - 'Poor' (AQI 201-300); Stage II - 'Very Poor' (AQI 301-400); Stage III - 'Severe' (AQI 401-450); and Stage IV - 'Severe Plus' (AQI 450). The city's AQI stood at 440 at 7 a.m. on Monday.