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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 19: Petrol price on Friday was hiked by 56 paise per litre and diesel by 63 paise a litre, taking the cumulative increase in rates to Rs 7.11 and Rs 7.67 per litre respectively in less than two weeks.

Petrol price in Delhi was hiked to Rs 78.37 per litre from Rs 77.81, while diesel rates were increased to Rs 77.06 a litre from Rs 76.43, according to a price notification of state oil marketing companies.

Rates have been increased across the country and vary from state to state depending on the incidence of local sales tax or VAT.

This is the 13th daily increase in rates in a row since oil companies on June 7 restarted revising prices in line with costs, after ending an 82-day hiatus in rate revision.

In 13 hikes, petrol price has gone up by Rs 7.11 per litre and diesel by Rs 7.67 a litre.

The freeze in rates was imposed in mid-March soon after the government hiked excise duty on petrol and diesel to shore up additional finances.

Oil PSUs Indian Oil Corp (IOC), Bharat Petroleum Corp Ltd (BPCL) and Hindustan Petroleum Corp Ltd (HPCL) instead of passing on the excise duty hikes to customers adjusted them against the fall in the retail rates that was warranted because of fall in international oil prices to two decade low.

International oil prices have since rebounded and oil firms are now adjusting retail rates in line with them.

Patna, Jun 25: At least 83 people died due to thunderstorms in Bihar in the last 24 hours, according to Chief Minister's Office.

Bihar Chief Minister Nitish Kumar announced Rs 4 lakhs each for the families of deceased.

Thirteen people died in Gopalganj, 8 each in Madhubani and Nawada, 6 each in Baghalpur and Siwan, 5 each in Darbhanga, Banka, East Champaran and 3 each in Khagaria and Aurangabad.

Due to thunderstorms, two people each lost their lives in West Champaran, Kishanganj, Jamui, Jahanabad, Purnia, Supaul, Buxar, Kaimur while one death each was reported in Samastipur, Shivhar, Saran, Sitamarhi and Madhepura.