Despite two of these areas having been declared high priority areas more than a decade ago - with the sole objective of reducing air pollution to fall within acceptable standards - air pollution remains high and at deadly exposure levels for human health.
Nine per cent of the PM2.5 pollution in the national capital is caused due to stubble burning, as per SAFAR.
Harsh Vardhan on air pollution increasing at an alarming rate in Delhi.
According to SAFAR - India (System of Air Quality and Weather Forecasting And Research), AQI in Delhi is expected to stabilise by evening and soon it will come in poor category.
CPCB chairman S P Singh Parihar said the deterioration of the air quality will continue till Tuesday morning.
"Continuous sources of pollution - industry, power plants, the way transport is, the way our waste management is" are the "four or five consistent sources of pollution are [there] all around the year", he says.
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Pollution levels in Delhi-National Capital Region are likely to see a spike in coming days, as farmers in neighbouring Punjab and Haryana step up stubble burning.
In October every year, air quality takes a plunge in the Indian capital of New Delhi due to the Diwali festival.
It is to be noted that private vehicles contribute to 40 percent of pollution in Delhi NCR and there about 35 lakh private vehicles in Delhi NCR region. Questioning Prime Minister Narendra Modi's silence on the issue, Congress spokesperson Abhishek Singhvi said while pollution was reaching hazardous levels in Delhi, the BJP and the Aam Aadmi Party (AAP) were only interested in scoring political points and one-upmanship. Visibility on the roads became opaque this morning, in comparison to Sunday when air quality relatively improved due to an increased speed of the wind.
The Delhi Pollution Control Committee has directed the transport department and the traffic police to intensify their drive against polluting vehicles until November 10.
Ban on construction and excavation (digging) activities.
The first-ever worldwide air pollution conference organised by the World Health Organisation (WHO) brought together government officials and health experts from more than 100 countries to place the issue on the global agenda.
Gurgaon recorded "severe" air quality at 416, while it was "very poor" in Ghaziabad, Faridabad, Noida and Greater Noida.