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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.

Feb 22: Prime Minister Narendra Modi is unlikely to accompany US President Donald Trump and his family members during their visit to the Taj Mahal in Agra on Monday, official sources said.

The US President will arrive in Ahmedabad at around noon on February 24 for a less that 36-hour visit to India. He will be accompanied by a high-level delegation including First Lady Melania Trump, the President's daughter Ivanka Trump, son-in-law Jared Kushner and a galaxy of top US officials.

After attending an event at Ahmedabad, the Trumps will travel to Agra on Monday afternoon to visit the Taj Mahal before arriving at the national capital for the main leg of the visit.

When asked about reports that Modi may accompany Trump to Agra, official sources said there was no such plan.

They said the visit to the Taj Mahal in Agra by the US President and his family members will afford them the opportunity to view the historical monument suitably. Therefore, no official engagements or presence of senior dignitaries from the Indian side is envisaged there, the sources said.

New Delhi, Mar 25: The Indian Rail Catering and Tourism Corporation (IRCTC) on Wednesday appealed to the people not to cancel their e-tickets on their own in case of trains being cancelled by the national transporter due to nation-wide lockdown to help curb the spread of novel coronavirus pandemic.

Clearing the doubts of the railway passengers, IRCTC spokesperson Siddharth Singh said, "Doubts have been raised regarding cancellation of e-tickets subsequent to the halting of railway passenger trains.

"It may be submitted that for trains cancelled by the railways in its complete run, refund on e-tickets is full and automatic. In this case, no cancellation exercise is required to be done on the part of the user," he said.

The IRCTC official said that if user cancels his e-ticket in situations of train cancellations, there are chances he may get "less refund". "Hence passengers are advised not to cancel e-tickets on their own for those trains which have been cancelled by the railways," he said.

He also said that the refund amount will be credited to the user account used for booking e-tickets automatically and no charges will be deducted by the railways in case of train cancellation.

His remarks came as the national transporter announced the suspension of the passenger, mail and express services from March 23 till March 31. However, the railways extended the suspension of services till April 14 in the wake of the three week lockdown announced by Prime Minister Narendra Modi from March 25 during his second special address to the nation on Tuesday night.

The railways has cancelled over 13,600 passengers trains across the country in a bid to combat the spread of novel coronavirus. Only freight trains are running to ensure the supply of essential services. About 9,000 freight trains are transporting essential items every day across the country.

On Wednesday, India recorded 562 cases of COVID-19 with 10 deaths.