According to the System of Air Quality and Weather Forecasting And Research (Safar), at least 33% of the pollutants originated from fires in farms in Punjab and Haryana, where farmers set fire to crop residue ahead of the next round of sowing later this month.
A ban on construction activities came into force on Thursday as Delhi's air quality was on the brink of turning "severe" due to stubble burning in the adjoining regions and unfavourable meteorological conditions, authorities said.
Meanwhile, Ghaziabad in Uttar Pradesh saw an improvement in AQI to 362.
A 10-day "Clean Air Campaign" from November 1 to November 10 has also been launched to monitor and report polluting activities.
The Supreme Court-appointed Environment Pollution Control Authority (EPCA) has urged Delhiites to use public transport for the first 10 days of November to keep a check on pollution.
"Construction material lying on the sites should be sprinkled with water and should also remain covered", he said. Union Minister Vijay Goel blamed Kejriwal for polluting Delhi.More news: Man-eating tigress shot dead in India
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Their growing bodies and brains are more affected by toxins that can, among other health risks, affect neurodevelopment and cognitive ability. "Only then can we find a soln (sic)".
An official said that the EPCA is even considering regulating use of private vehicles in the wake of an alarming rise in air pollution in Delhi.
"Let there be no politics on this matter. Data revealed that compared to past year, there has been a 30 per cent reduction in stubble burning".
Harsh Vardhan and Imran Hussain also flagged off five buses fitted with air-filters at the top to tap particle pollutant, under a pilot project to ply 30 such buses.
The city's Air Quality Index (AQI) is already at the brink of slipping into the "severe" category. The government, thus far, has prohibited the sale for fireworks and placed restrictions on their usage.
That is almost 24 times a recommended level of 25 micrograms per cubic metre on average over a 24-hour period, set by the World Health Organization, which this year said India was home to the world's 14 most polluted cities.
Authorities warn that crop residue burning will peak in the next few days, adding to the fears Indians will celebrate the festival of Diwali on Wednesday, could add to the smoke pollution.
According to reports of the South African National Department of Environmental Affairs, and confirmed by our own experience and analysis, air quality exceeds the South African ambient air quality standards (AAQS) on an ongoing basis; especially in the Highveld, Mpumalanga, Vaal, and Waterberg-Bojanala priority areas.