Around 70 north-bound trains, including Rajdhani services, were delayed, while around 30 others were rescheduled due to fog.

LUCKNOW: Pollution level soared again in Lucknow with change in weather condition. For the second time in the month, the city was engulfed in dense smog on Tuesday.

Patna: The air quality index (AQI) in the state capital on Tuesday stood at 476, the highest in the country and probably the highest-ever in the city.

MUMBAI: An experiment will soon get underway at three busy traffic junctions in the city to ascertain if a new air purifying device, called WAYU, can disperse the deadly particulate matter.

Authorities in the national capital plan to have around 20 monitoring stations that will exclusively measure the levels of ultrafine particulates PM 2.5 and PM 10, the dominant pollutants in Delhi'

Almost nine out of 10 European city dwellers breathe air that is harmful to their health, though the continent's air quality is slowly improving, the European Environment Agency (EEA) said today.

Delhi, Faridabad and Varanasi have the poorest air quality among the 32 Indian cities which are connected to the web-based system National Air Quality Index Portal.