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New Delhi, Jul 18: The Covid-19 lockdown-led reduction in air pollution levels across five Indian cities, including Delhi and Mumbai, may have prevented about 630 premature deaths, and saved USD 690 million in health costs in the country, according to a new study.

Scientists, including those from the University of Surrey in the UK, assessed the levels of harmful fine particulate matter (PM2.5) from vehicles and other sources in five Indian cities -- Delhi, Mumbai, Kolkata, Chennai and Hyderabad -- since the beginning of the lockdown period.

The study, published in the journal Sustainable Cities and Society, compared these lockdown PM2.5 figures from 25 March up until 11 May, with those from similar periods of the preceding five years, and found that the measure reduced pollution levels in all these places.

According to the scientists, during this period, the levels of these harmful air pollutants reduced by 10 per cent in Mumbai, and by up to 54 per cent in Delhi.

"The percentage reduction for the other cities ranged from 24 to 32 per cent, which was slightly smaller than the measured values for Delhi and Mumbai," the scientists noted in the study.

"While the reduction in PM2.5 pollution may not be surprising, the size of the reduction should make us all take notice of the impact we have been having on the planet," said Prashant Kumar, a co-author of the study from the University of Surrey.

The scientists said these reductions in PM2.5 were comparable to those reported in other cities across the world, such as in Austria's capital Vienna (60 per cent), and Shanghai (42 per cent) in China.

They also calculated the monetary value of the reduced mortality due to air pollution and found that the lowered levels of PM2.5 may have saved 630 people from premature death, and USD 690 million in health costs in India.

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According to the researchers, the present lockdown situation offers observational opportunities regarding potential control systems and regulations for improved urban air quality.

They said an integrated approach might help in understanding the overall impacts of Covid-19 lockdown-style interventions and support the implementation of relevant policy frameworks.

"This is an opportunity for us all to discuss and debate what the 'new normal' should look like - particularly when it comes to the quality of the air we breathe," Kumar said.

New Delhi, Jun 25: The Supreme Court on Thursday asked the Centre and the CBSE to issue fresh notification in connection with Class 12 exams, clarifying the option between internal assessment and exams later.

The observation from the top court after it was informed that the CBSE has decided to cancel the remaining board exams for Class 10 and Class 12.

A bench comprising Justices AM Khanwilkar, Dinesh Maheshwari and Sanjiv Khanna asked the Centre to clarify the issue of taking the option between internal assessment and exams later.

"Clarify the date of results," said the bench, noting that the CBSE will have to submit a fresh draft notification cancelling class 12 Board exams and affidavit on Friday morning, before the top court continues to hear the matter again at 10.30 a.m.

The apex court also sought clarity on the beginning of the new academic year.

It told Solicitor General Tushar Mehta, representing the Centre, that the CBSE is willing to conduct exams when the situation is conducive, but this may vary from state to state. "Will the decision be taken by a central authority or will the state government take the decision? How are you going to deal with that situation?"

Mehta replied that the decision must be taken according to the situation. To this, the bench said should not the solution be pan-India?

"You have not said when you will decide on this issue, and when you will take stock of these things. Some time frame will have to be given," noted the bench.

Continuing its queries, the bench said: "What about state regional board exams... the CBSE does not hold all the exams. The state Board is also there."

Mehta replied that the instructions from the controller of examinations are that exams are controlled centrally. "State boards assist the CBSE," he replied.

The bench observed that the government should modify the draft notification and include the state board issue. "Clear the stand that decision will be taken at the central level and not at the state level... other courses will have to be delayed till CBSE exam results come out," it said.

Mehta replied the assessment results will be published now, and if a student wants to opt to give the exam, then that will be conducted later. The top court asked Mehta to bring this on record and redraft the notification.

New Delhi, May 18: Very severe cyclonic storm ‘Amphan’, over central parts of South Bay of Bengal, has intensified into extremely severe cyclonic storm, the India Meteorological Department (IMD) said on Monday. The weather department has warned that ‘Amphan’ may turn into a “super cyclonic storm’.

According to experts, North Odisha coast will face the maximum impact of cyclone Amphan when it makes landfall.

“Wind speed expected to be 110-120 kmph, gusting up to 130 kmph. Balasore, Bhadrak, Jajpur, Mayurbhanj dist can be affected on 20 May (when it makes landfall), IMD Bhubaneswar scientist Umashankar Das told news agency ANI.

The IMD has said that ‘Amphan’ will cross West Bengal - Bangladesh coasts between Digha (WB) and Hatiya island - in the afternoon/evening of May 20 as very severe cyclonic storm.

Earlier, the IMD had warned that ‘Amphan’, over central parts of South Bay of Bengal, will intensify into an extremely severe cyclonic storm on Monday.

“Very Severe Cyclonic Storm (VSCS) ‘AMPHAN’ over central parts of South Bay of Bengal near latitude 12.5°N and longitude 86.4°E, about 870 km nearly south of Paradip (Odisha). To intensify further into an Extremely Severe Cyclonic Storm (ESCS) in the next six hours,” the IMD said in a tweet on Monday.

National Disaster Response Force (NDRF) has sent its 10 teams to Odisha and seven teams to West Bengal in view of the approaching Cyclone Amphan, news agency reported.