ALSO READIn pics: Delhiites brave dense smog, schools shut till Sunday Delhi smog: NGT bans construction, industrial work and top 10 developments Delhi air deteriorates: Primary schools shut till Sunday, govt may bring back odd-even Delhi Metro asked to increase frequency as smog nears zero visibility New Delhi's notoriously toxic air is so dirty that your head spins
A thick layer of smog continued to blanket the national capital and its adjoining region on Sunday even as reports claimed that the air quality was slowly, but steadily, improving.
The city's Air Quality Index has been in the range of 700 to 1,000, making it difficult for people in the state to even breathe.
One of the residents of the city told ANI, "It is tough to breathe and the situation needs to be fixed."ALSO READ: Delhi govt defers Odd-Even, to ask NGT tomorrow to exempt women, 2-wheelers
As the pollution has hit 70 times the World Health Organisation's safe limit, doctors have suggested people to wear N90 masks whenever they go out, as exposure to air pollution can lead to cancer and heart disease.
Taking cognisance of it, people at the historical India Gate were seen wearing masks.
A jogger at the India Gate, Shubhankar Tomar, told ANI, "Today the fog is back. Yesterday, there was not much.
The government should take an initiative to resolve this deadly situation."
Another jogger said, "We are facing breathing problems now. We are taking precautions to protect ourselves from respiratory problems."ALSO READ: Delhi smog: United cancels flights to the city on air quality concerns
Meanwhile, the Health Ministry has also issued an advisory, asking citizens to drink plenty of water and avoid areas with smoke or heavy dust.
The Central Pollution Control Board (CPCB) has identified four reasons for the sudden onset of pollution - temperature, wind speed, relative humidity and atmospheric boundary layer - for the worsening Delhi air.
The National Green Tribunal (NGT) has banned construction, one source of particulate matter pollution, in the region through November 14, whereas truck and car travel has also been limited.
Trucks and heavy vehicles were barred from entering into Delhi last night.ALSO READ: Delhi smog: Air pollution causes weak bones, increases early death risks