New Delhi(PTI): A layer of smog shrouded Delhi-NCR on Thursday and partially blotted out the sun on Chhath Puja as the air quality slipped back into the severe zone with unfavourable meteorological conditions aiding accumulation of pollutants, authorities said.

Green think tank Centre for Science and Environment (CSE) said the ongoing smog episode is a public health emergency.

"This requires urgent emergency action on key combustion sources (vehicles, industry, waste burning) and dust sources (construction and roads) to prevent further trapping of pollution when there is no wind to blow this away," said Anumita Roychowdhury, executive director, research and advocacy, CSE.

At 10 am, Delhi recorded an Air Quality Index (AQI) of 407. Thirty-three of the 39 air quality monitoring stations in the national capital recorded air pollution levels in the severe category.

The 24-hour average AQI was 372 on Wednesday.

Ghaziabad (454), Greater Noida (404) and Noida (426) also recorded severe air quality at 10 am.

An AQI between zero and 50 is considered "good", 51 and 100 "satisfactory", 101 and 200 "moderate", 201 and 300 "poor", 301 and 400 "very poor", and 401 and 500 "severe".

An official from the India Meteorological Department (IMD) said shallow fog and low temperatures in the morning -- Delhi recorded the season's lowest temperature of 12.6 degrees Celsius on Thursday -- trapped pollutants close to the ground and calm winds led to stagnant conditions.

Visibility levels at the Indira Gandhi International Airport and the Safdarjung Airport dropped to 600-800 metres, he added.

The CSE said the current severe smog episode in Delhi-NCR is expected to last for two more days.

It also said the average daily contribution of smoke from farm fires from the middle of October to November 8 was the lowest in four years.

"Compared to the first smog episode of the previous four years, the current smog has matched the duration of the first smog of 2018 and 2020 season -- both lasted six days. If conditions do not improve, it might overtake the 2019 smog that lasted eight days," the CSE said.

The longer duration of this year's smog despite relatively windier local conditions might be due to a lack of pollution control measures in the city, the green think tank said.

On an average, the contribution of smoke to Delhi's daily PM2.5 from the middle of October to November 8 was the lowest in the last four years.

"So far, it has recorded an average of 12 per cent (farm fire share) per day in contrast to 17 per cent per day in 2020, 14 per cent per day in 2019 and 16 per cent per day in 2018 (as reported by SAFAR)," the CSE said.

The share of farm fires in Delhi's pollution rose to 48 per cent on Sunday, the highest since November 5, 2018, when it was recorded at 58 per cent.

Last year, the share of stubble burning in Delhi's pollution had peaked at 42 per cent on November 5. In 2019, crop residue burning accounted for 44 per cent of Delhi's PM2.5 pollution on November 1.

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Thiruvananthapuram (PTI): Buoyed by the strong performance of the Congress-led UDF in the local body polls, KPCC president Sunny Joseph said on Saturday that the front's results indicated the people had rejected the LDF government.

According to early trends, the UDF was leading in more grama panchayats, block panchayats, municipalities and corporations than the LDF.

The local body polls were held in two phases in the state earlier this week.

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Speaking to reporters here, Joseph said the people of Kerala had extended their support to the UDF.

"We could expose the LDF government’s anti-people stance and the people understood it. The LDF’s fake propaganda was rejected by the people. The UDF is moving towards a historic victory," he said.

He said a united effort, proper preparations, good candidate selection and hard work had resulted in the Congress and the UDF’s victory in the elections.

Asked about the prospects in the Thiruvananthapuram Corporation, Joseph said the party was studying the matter and would comment later.

LDF convenor T P Ramakrishnan said the results would be closely examined.

According to him, the government had done everything possible for the people.

"Why such a verdict happened will be examined at the micro level. People’s opinion will be considered and further steps will be taken," he said.

He added that decisions would be taken after analysing the results. "If any corrective measures are required, we will initiate them and move forward," he said.

AICC leader K C Venugopal said the results showed that people had begun ousting those who, he alleged, were responsible for the loss of gold at Lord Ayyappa’s temple.

"This trend will continue in the Assembly elections as well. It is an indication that the people are ready to bring down the LDF government," he said.

Venugopal said the UDF had registered victories even in CPI(M) and LDF strongholds.

"I congratulate all UDF workers for their hard work. Congress workers and leaders worked unitedly," he said.

Referring to remarks made by Chief Minister Pinarayi Vijayan against the Congress on polling day, Venugopal said the voters had responded through the verdict.

"I do not know whether the chief minister understands that the people are against him. Otherwise, he does not know the sentiment of the people. The state government cannot move an inch further," he said.

He said the results indicated a strong comeback for the UDF in Kerala.

Asked whether the Sabarimala gold loss issue had affected the LDF in the local polls, Venugopal said the CM and the CPI(M) state secretary did not take the issue seriously.

"We took a strong stand on the matter. The BJP played a foul game in it," he alleged.

On the BJP's role in the local body elections, Venugopal alleged that the party operated with the CPI(M) 's tacit support.

"The CPI(M) supported the central government on issues such as PM-SHRI, labour codes and corruption in national highway construction. The CPI(M) is facing ideological decline, and the state government’s policies are against the party’s own decisions," he said.

Meanwhile, LDF ally Kerala Congress (M) leader Jose K Mani said the party could not win all the wards it had expected in the elections.

He congratulated winners from all parties and said the party would closely examine the losses and identify shortcomings. "Later, we will take corrective measures," he added.

Senior Congress leader and MP Rajmohan Unnithan said the trends in the local body elections indicated that the UDF would return to power in the 2026 Assembly elections.

"We will win 111 seats as in 1977 and return to power in 2026. The anti-government sentiment of the people is reflected in the elections," he said.

Unnithan said the people were disturbed and unhappy with the present government.

"The trend indicates the end of the LDF government," he added.

CPI(M) MLA M M Mani said the people had shown ingratitude towards the LDF despite benefiting from welfare schemes.

"After receiving all welfare schemes and living comfortably, people voted against us due to some temporary sentiments. Is that not ingratitude," he asked.

Mani said no such welfare initiatives had taken place in Kerala earlier.

"People are receiving pensions and have enough to eat. Even after getting all this, they voted against us. This is what can be called ingratitude," he said.

Muslim League state president Panakkad Sayyid Sadiq Ali Shihab Thangal said the results were beyond expectations.

"The outcome points towards the Secretariat in Thiruvananthapuram, indicating that a change of government is imminent. We are going to win the Assembly election," he said.