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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.

Bengaluru, May 21: The top two food-delivery startups, Swiggy and Zomato, will begin delivering alcohol in some cities starting from today, as they cash in on the high demand for booze during the country's coronavirus lockdown.

India was among the few countries to restrict liquor and tobacco sales as it announced one of the world's strictest lockdowns in March.

Hundreds of people started queuing up at liquor stores earlier this month when the government eased some restrictions, leading the police to resort to baton-charges to disperse crowds in some cases.

The companies will roll out the service in select cities in Jharkhand, starting with Ranchi from today, Swiggy and Zomato said in separate statements.

Swiggy said it was in advanced talks with multiple states to launch the service in more locations, and both firms said the move to allow alcohol orders through smartphones will promote social distancing and customer safety.

"By enabling home delivery of alcohol, we can generate additional business for retail outlets while solving the problem of overcrowding," said Anuj Rathi, vice president of products at Bengaluru-based Swiggy.

The new service also comes as both Swiggy and Zomato face sharp declines in their core business, with restaurants remaining shut during the two-month lockdown, forcing the companies to cut hundreds of jobs to save cash.

News agency reported earlier this month that Zomato was aiming to branch out into delivering alcohol. Swiggy is backed by South African internet group Naspers Ltd, while Ant Financial, an affiliate of Chinese e-commerce giant Alibaba Group Holding Ltd, is a major investor in Zomato.

Mumbai, May 31: Shiv Sena leader Sanjay Raut on Sunday alleged that the event held in Ahmedabad to welcome US President Donald Trump in February was responsible for the spread of coronavirus in Gujarat and later in Mumbai and Delhi, which some of his delegates had visited.

Raut also hit out at the Centre saying that the lockdown was implemented without any planning, but now the responsibility of lifting the curbs was left to the states.

The Sena MP said that despite the opposition BJP's attempts to pull down the Maharashtra Vikas Aghadi (MVA) government, there was no threat to it as its survival is the 'majboori' (compulsion) of all the three ruling allies- Sena, NCP and Congress.

"It can't be denied that the spread of coronavirus in Gujarat was because of the massive public gathering held to welcome US President Donald Trump. Some of the delegates, who accompanied Trump, also visited Mumbai, Delhi, which led to the spread of the virus," Raut said in his weekly column in Shiv Sena mouthpiece 'Saamana'.

On February 24, Trump along with Prime Minister Narendra Modi had taken part in a road-show in Ahmedabad, which was attended by thousands of people. After the road- show, the two leaders had addressed a gathering of over one lakh people at Motera cricket stadium, run by Gujarat Cricket Association (GCA).

Gujarat had reported its first coronavirus cases on March 20, when samples of a man from Rajkot and a woman from Surat tested positive for the disease.

Raut said that any move to pull down the Uddhav Thackeray-led MVA government and impose President's rule in the state citing its failure to curb the coronavirus pandemic would be suicidal.

"The state had witnessed how President's rule was imposed and lifted as per will six months ago," he said.

"If the handling of coronavirus cases is the basis of imposing President's rule, then it should be done in at least 17 states, including the BJP-ruled ones. Even the central government has failed to curb the pandemic as it had no planning to fight the virus," he said.

"The lockdown was imposed without any planning and now without any plan, the responsibility of lifting it has been left to the states. This chaos will further worsen the crisis," he said.

The Sena MP said that Congress leader Rahul Gandhi has made an excellent analysis of how the lockdown has failed.

"It is shocking that people can indulge in politics by demanding President's rule in Maharashtra for the rise in the coronavirus cases," he said.

BJP MP Narayan Rane had recently met Maharashtra Governor B S Koshyari and demanded imposition of President's rule in view of the the Shiv Sena-led state government's "failure" in tackling the coronavirus pandemic. However, the BJP had later said that it was not trying to destabilise the government.

Speaking about the stability of the government, Raut said that the survival of the MVA government was the 'majboori' (compulsion) of each of the three alliance partners.

"Even if there are internal conflicts among the ruling partners, there is no threat to the government as the allies know that its survival is the 'majboori' of each one of them," Raut said.

He said that the Devendra Fadnavis-led government, in which the BJP and Shiv Sena shared power, saw internal conflicts between the ruling allies, but it completed its full five-year term.

Slamming Fadnavis, who is now the Leader of Opposition in the Legislative Assembly, for predicting downfall of the MVA government saying it will fall on its own due to its internal bickering.

"If the Fadnavis government, which witnessed deep internal conflicts between BJP and Sena, didn't fall, how can this one collapse? The Fadnavis government survived despite the (Sena) ministers carrying their resignation letters in their pockets," Raut wrote.

Fadnavis, in an online media interaction held earlier recently, said he had no intention to destabilise the MVA government and said it would collapse on its own.

"What Fadnavis means is that all attempts (of the BJP) to create discord among the three allies and break the MLAs has failed. Now the opposition hopes that something would happen among the allies and the government would be fall apart," he said.

Raut said NCP president Sharad Pawar is the prominent leader, who laid the foundation stone of the "Thackeray sarkar", and only he can predict the future of the government.

"He continues to say the government is stable and even the Congress is not going anywhere. MVA legislators are not up for sale in horse-trading. Hence, if the opposition says that the government will fall, it is wrong," he said.