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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 26: In a midnight hearing, the Delhi High Court directed police to ensure safe passage to government hospitals and emergency treatment for those injured in the communal violence erupted in northeast Delhi over the amended citizenship law.

The court held a special hearing, which started at 12:30 am, at the residence of Justice S Muralidhar after receiving a call from an advocate explaining the dire circumstances under which the victims were unable to be removed from a small hospital to the GTB Hospital.

A bench of Justices S Muralidhar and Anup J Bhambhani directed the Delhi Police to ensure safe passage of the injured victims by deploying all resources at its command and on the strength of this order as well as to make sure they receive immediate emergency treatment if not at the Guru Teg Bahadur Hospital then at the Lok Nayak Jai Prakash Narayan Hospital (LNJP) or Maulana Azad or any other hospital.

The bench also called for a status report of compliance, including information about the injured victims and the treatment offered to them, and the matter will be heard during the day at 2:15 pm.

It said the order be communicated to the medical superintendents of the GTB and the LNJP Hospitals.

The urgent hearing was conducted after advocate Suroor Mander called the judge and sought urgent orders for safe passage of ambulances for the injured.

The Delhi Police and the government were represented through additional standing counsel Sanjoy Ghose.

During the hearing, the bench spoke over phone to doctor Anwar of the Al-hind Hospital in New Mustafabad who told the court that there were two bodies and 22 injured persons there and he had been trying to seek police assistance since 4 pm on Tuesday without success.

The court then directed the senior officials to reach to the hospital forthwith, following which they started the process of evacuating the injured to the nearest hospitals.

It also said this order be brought to the knowledge of the Delhi Police Commissioner.

Communal violence over the amended citizenship law in northeast Delhi claimed at least 18 lives till Wednesday.

On Tuesday, the violence escalated in northeast Delhi as police struggled to check the rioters who ran amok on streets, burning and looting shops, pelting stones and thrashing people.

Jun 23: The U.S. government on Monday restricted charter flights from India, accusing the nation of "unfair and discriminatory practices" by violating a treaty governing aviation between the two countries.

Air India Ltd. has been making flights to repatriate its citizens during the travel disruptions caused by the Covid-19 outbreak, but also has been selling tickets to the public, the Transportation Department alleged.

At the same time, U.S. airlines have been prohibited from flying to India by aviation regulators there, the DOT said in its order. The situation "creates a competitive disadvantage for U.S. carriers," the agency said in a press release.

Air India is advertising a schedule that is more than half of pre-virus operations, the department said. "The charters go beyond true repatriations, and it appears that Air India may be using repatriation charters as a way of circumventing" that nation's flight restrictions, the U.S. agency said.

The order becomes effective in 30 days, the department said.

Indian airlines must apply to the DOT for authorization before conducting charter flights so that it can scrutinize them more closely, it said. The department will reconsider the restrictions once India lifts restrictions on U.S. carriers.

The action against India follows weeks of DOT restrictions against Chinese airlines after the U.S. agency accused that nation of unfairly banning American carriers in the wake of the virus. On June 15, the U.S. announced it would agree to allow four flights a week from China after it allowed the same number by U.S. carriers.

Attempts to reach Air India and the Indian embassy in Washington after business hours were unsuccessful.