Kohli is cricketing version of Ronaldo: Brian Lara

Washington, Apr 23: Air pollution over northern India has plummeted to a 20-year-low for this time of the year, according to satellite data published by US space agency National Aeronautics and Space Administration (NASA).
The US space agency's satellite sensors observed aerosol levels at a 20-year low post the countrywide lockdown, implemented to slow the spread of the novel coronavirus.

"We knew we would see changes in atmospheric composition in many places during the lockdown," said Pawan Gupta, a Universities Space Research Association (USRA) scientist at NASA''s Marshall Space Flight Center. "But I have never seen aerosol values so low in the Indo-Gangetic Plain at this time of year," added Mr Gupta.

Acting Assistant Secretary of State for South and Central Asia Alice G Wells tweeted, "These images from NASA were taken each spring starting in 2016 and show a 20-year low in airborne particle levels over India. When India and the world are ready to work and travel again, let's not forget that collaborative action can result in cleaner air."

The data published with maps show aerosol optical depth (AOD) in 2020 compared to the average for 2016-2019. Aerosol optical depth is a measure of how light is absorbed or reflected by airborne particles as it travels through the atmosphere.

If aerosols are concentrated near the surface, an optical depth of 1 or above indicates very hazy conditions. An optical depth, or thickness, of less than 0.1 over the entire atmospheric vertical column is considered "clean." The data were retrieved by the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA's Terra satellite.

In the first few days of the lockdown, it was difficult to observe a change in the pollution signature. "We saw an aerosol decrease in the first week of the shutdown, but that was due to a combination of rain and the lockdown," said Mr Gupta.

Around March 27, heavy rain poured over vast areas of northern India and helped clear the air of aerosols. Aerosol concentrations usually increase again after such heavy precipitation.

"After the rainfall, I was really impressed that aerosol levels did not go up and return to normal. We saw a gradual decrease and things have been staying at the level we might expect without anthropogenic emissions," Mr Gupta said.

On March 25, the Indian government placed its 1.3 billion citizens under a strict lockdown to reduce the spread of COVID-19. The countrywide mandate decreased activity at factories and severely reduced car, bus, truck and airplane traffic. Every year, aerosols from anthropogenic (human-made) sources contribute to unhealthy levels of air pollution in many Indian cities.

Aerosols are tiny solid and liquid particles suspended in the air that reduce visibility and can damage the human lungs and heart.

In southern India though, the story is a little hazier. Satellite data show aerosol levels have not yet decreased to the same extent. In fact, levels seem to be slightly higher than in the past four years. The reasons are unclear but could be related to recent weather patterns, agricultural fires, winds or other factors.

"This a model scientific experiment," Robert Levy, program leader for NASA's MODIS aerosol products, said about the lockdown and its effects on pollution.

"We have a unique opportunity to learn how the atmosphere reacts to sharp and sudden reductions in emissions from certain sectors. This can help us separate how natural and human sources of aerosols affect the atmosphere," Mr Levy added.

Jan 31: Twenty-three children aged between six months and 15 years, who had been taken hostage by a murder accused after inviting them to his daughter's birthday party, were rescued late on Thursday night after police killed their captor in a village here.

The hostage drama began at Kasaria village in the afternoon and continued for about eight hours.

"The accused was killed and there were about 23 children who were rescued safely," Additional Chief Secretary (Home) Awanish Awasthi told reporters at a hurriedly called press conference at 1.20 am.

"The accused had invited the children for the birthday party of his daughter and held them hostage. It started about 5.45 pm on January 30 and continued for about eight hours," Director General of Police (DGP) O P Singh said, adding that in the entire operation they had tried to "engage" the accused and were successful.

He said the accused, identified as Subhash Batham, had initially released a six-month-old girl by handing her over to his neighbour from a balcony.

Eyewitnesses said a restive crowd gathered outside the house where the children were kept with some women wailing and praying for their safe release.

The crowd broke open the door of the house to rescue the children, they said.

As the accused opened fire, the police retaliated killing him on the spot.

In the exchange of fire, the captor's wife was injured, but none of the children suffered any injury.

A man and two policemen also suffered bullet injuries.

The motive of the accused was not known immediately.

Chief Minister Yogi Adityanath monitored the situation in Farrukhabad, which is nearly 200 km from state capital Lucknow.

"The CM as soon as he got to know about the incident called a meeting of the crisis management group and personally monitored the situation and ensured children are rescued safely," Awasthi said.

Earlier, a team of NSG (National Security Guard) commandos had taken a special aircraft to reach Farukhabad, a senior security official in Delhi said.

Police said Batham, a murder accused, seemed to be mentally unstable.

Inspector-General of Police, Kanpur Range, Mohit Agarwal, said, "The man called the children for a birthday party and held them hostage in the basement of the house. He fired six shots from inside the building."

Batham initially wanted to talk to the local MLA, but refused to speak to the leader when he arrived, Agarwal said.

Jun 1: Premier India pacer Jasprit Bumrah won't miss the hugs and high-fives as part of a wicket celebration but he will certainly miss applying saliva on the ball and feels an alternative should be provided to maintain the red cherry.

The ICC Cricket Committee, led by former India captain Anil Kumble, recommended a ban on using saliva on the ball as an interim measure to deal with the COVID-19 pandemic. However, the Committee did not allow the use of artificial substances as a substitute move.

The new rule makes life tougher for the bowlers and Bumrah, like many former and current fast bowlers, feels there ought to be an alternative.

"I was not much of a hugger anyway and not a high-five person as well, so that doesn't trouble me a lot. The only thing that interests me is the saliva bit," said Bumrah in a chat with Ian Bishop and Shaun Pollock on ICC's video series 'Inside Out'.

"I don't know what guidelines we'll have to follow when we come back, but I feel there should be an alternative," he added.

Bumrah said not being able to use saliva makes the game more batsman-friendly.

"If the ball is not well maintained, it's difficult for the bowlers. The grounds are getting shorter and shorter, the wickets are becoming flattered and flatter.

"So we need something, some alternative for the bowlers to maintain the ball so that it can do something - maybe reverse in the end or conventional swing."

When former West Indian pacer Bishop pointed out that the conditions have been favorable to the fast bowlers over the last couple of years, Bumrah nodded in agreement.

"In Test match cricket, yes. That is why it's my favorite format because we have something over there. But in one-day cricket and T20 cricket… one-day cricket there are two new balls, so it hardly reverses at the end.

"We played in New Zealand, the ground (boundary) was 50 metres. So even if you are not looking to hit a six, it will go for six. In Test matches I have no problem, I'm very happy with the way things are going."

He finds it amusing that the batsmen keep complaining about the swinging ball.

"Whenever you play, I've heard the batsmen - not in our team, everywhere - complaining the ball is swinging. But the ball is supposed to swing! The ball is supposed to do something! We are not here just to give throwdowns, isn't it? (laughter)

"This is what I tell batsmen all the time. In one-day cricket, when did the ball reverse last, I don't know. Nowadays the new ball doesn't swing a lot as well. So whenever I see batsmen say the ball is swinging or seaming and that is why I got out - the ball is supposed to do that.

"Because it doesn't happen so much in the other formats, it's a new thing for the batsmen when the ball is swinging or seaming," said the 26-year-old.

The Ahmedabad-born pacer finds himself in an unusual position as he has not bowled for over two months due to the lockdown imposed in the wake of the coronavirus outbreak.

When India will play next is not clear yet and Bumrah said he is not sure about how his body will hold up when he returns to action.

"I really don't know how your body reacts when you don't bowl for two months, three months. I'm trying to keep up with training so that as soon as the grounds open up, the body is in decent shape.

"I've been training almost six days a week but I've not bowled for a long period of time so I don't know how the body will react when I bowl the first ball.

"I'm looking at it as a way to renew your own body. We'll never get such a break again, so even if you have a small niggle here and there, you can be a refreshed person when you come back. You can prolong your career," he said.

Bumrah has risen rapidly in international cricket despite experts having reservations about his longevity due to his unorthodox action.

The gritty fast bowler sees similarities in his career graph to Swedish football star Zlatan Ibrahimovic.

"Our personalities are different. But the story I could relate to is that not many people thought he would make it big. There was a similar case with me growing up as well.

"Wherever I went, it was the general feedback from people that 'this guy would not do anything, he would not be a top-rated bowler, he won't be able to play for a long period of time with this kind of action'.

"So, having the self-belief is important and the only validation that is required is your own validation. I saw that in his (Ibrahimovic's) story, so that's the thing I could relate to," added Bumrah.