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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.

Kolkata, May 19: The super cyclonic storm 'Amphan' in west-central Bay of Bengal is likely to weaken into an 'extremely severe cyclonic storm' by noon on Tuesday, the Met department said here.

The system, which was situated 670 km south-southwest of Digha in West Bengal, is very likely to move north-northeastwards across northwest Bay of Bengal, and cross West Bengal-Bangladesh coasts in the afternoon or evening of Wednesday as a 'very severe cyclonic storm', the Met department said.

The weatherman said that 'Amphan' is expected to cross West Bengal-Bangladesh coasts between Digha in West Bengal and Hatiya islands in Bangladesh on May 20 as a very severe cyclonic storm, after losing some steam as it approaches landfall, with a maximum sustained wind speed of 155 to 165 kmph gusting to 180 kmph.

Gale wind speeds reaching 240 to 250 kmph were prevailing over west-central and adjoining east-central Bay of Bengal, the Met office said, adding, it will gradually reduce to 200 to 210 kmph gusting to 230 kmph by Tuesday evening.

The Met department, which has issued an "orange message" for West Bengal, warned of extensive damage in Kolkata, Hooghly, Howrah, South and North 24 Parganas and East Midnapore districts.

There is likely to be disruption of rail and road link at several places, uprooting of communication and power poles and extensive damage to all types of 'kutcha' houses, the weatherman said.

There is also likelihood of massive harm to standing crops, plantations and orchards, the Met office said.

Wind speeds along and off the coastal areas of West Bengal will reach 45 to 55 kmph with gusts of 65 kmph from Tuesday afternoon, and will gradually increase becoming gale wind speeds reaching 75 to 85 kmph with gusts up to 95 kmph from May 20 morning along and off districts of North and South 24 Parganas, East and West Midnapore, Kolkata, Howrah and Hooghly, Regional Met Director G K Das said.

"It will gradually increase thereafter becoming 110 to 120 kmph gusting to 130 kmph over West Midnapore, Howrah, Hooghly, Kolkata and wind speeds of 165 to 175 kmph gusting to 195 kmph over the districts of North and South 24 Parganas and East Midnapore from the afternoon to night of May 20," Das said.

Under its impact, the coastal districts of Gangetic West Bengal, including North and South 24 Parganas, Kolkata, East and West Midnapore, Howrah and Hooghly are likely to experience light to moderate rain at many places with heavy downpour at isolated places on Tuesday, he said.

On Wednesday, rainfall will occur in many places over the districts of Gangetic West Bengal, with extremely heavy rain at one or two places in Kolkata, Howrah, East Midnapore, North and South 24 Parganas and Hooghly districts, he said.

Srinagar, May 12: Two paramilitary Central Reserve Police Force (CRPF) officers committed suicide after shooting themselves with their service rifles in Kashmir on Tuesday.

In the first incident, a CRPF sub-inspector on Tuesday committed suicide after shooting himself with his service rifle at Mattan area of south Kashmir’s Anantnag district. The deceased, identified as Fatah Singh of Jaisalmer in Rajasthan, had reportedly left behind a suicide note that read: “I am afraid, I may have Corona.”

Station House Officer (SHO) Akura, Mattan police station Jazib Ahmed said that they have followed the COVID-19 protocol while dealing with the body of the CRPF sub-inspector. “His samples have been taken and post-mortem conducted. Only results would confirm whether he was a COVID-19 positive,” he said.

CRPF spokesman in Srinagar Pankaj Singh said the officer had returned to his unit after performing a day-long duty. “As such, there is no evidence that he had caught COVID-19. Let’s wait for the final report. Details will be shared with the media,” Singh said.

Hours after the first incident, an assistant-sub-inspector of the CRPF posted in Srinagar also committed suicide by shooting himself dead with his service rifle.

Special Director General of CRPF, Zulfikar Hassan said they were trying to find out the reason for the two boys taking this extreme step.

Suicides and fratricide incidents are not uncommon among the CRPF and the Army personnel deployed in Kashmir. In 2006, recognising the rising fratricide and suicide cases among the armed forces, the then Defence Minister had constituted an expert group of psychiatrists under the Defence Institute of Psychological Research in order to suggest remedial measures to prevent suicide and fratricide incidents.

Over the last decade, incidents of fratricide have reportedly reduced in the Army as the force has taken measures to address the issue.