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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.

Jamnagar, Apr 7: A 14-month-old baby boy, who had tested positive for coronavirus in Gujarat's Jamnagar district on April 5, died of multiple organ failure on Tuesday, said officials.

The toddler, son of a migrant labourer-couple having no recent travel history, died in the evening at a government hospital in Jamnagar, said an official release.

He was in a critical condition ever since he was admitted to the hospital, it said.

The boy, who tested positive for coronavirus two days ago, was as on ventilator support and eventually died due to multiple organ failure, said the release.

He becomes the youngest patient to succumb to COVID-19 in Gujarat, where the death toll has now gone up to 16.

The baby was the first and the only case of coronavirus infection so far in entire Jamnagar district and the youngest to be diagnosed with the disease in Gujarat.

Ever since he tested coronavirus positive, the authorities had been tracing the source of his infection.

His parents are from Uttar Pradesh and work as casual labourers in factories in the port city.

His parents, who have no travel history in the recent past, are asymptomatic (not showing symptoms) and kept under quarantine, officials said.

The locality where the couple resides in Dared village near Jamnagar city has been put under complete lockdown to check the spread of the virus, they said.

Gujarat has so far recorded 175 coronavirus positive cases and 16 fatalities.

New Delhi, Jan 4: "Sovereign, socialist, secular, democratic republic" is how India is referred to in the preamble of the Constitution. However, J Nandakumar, a key RSS leader and All India Convenor Prajna Pravah, a Sangh offshoot, wants India to reconsider the inclusion of the word "secular", claiming secularism is a "western, Semitic concept".

In an exclusive interview to news agency, Nandakumar said: "Secularism is a western, Semitic concept. It came into existence in the West. It was actually against Papal dominance."

He argued that India does not need a secular ethos as the nation has moved "way beyond secularism" since it believes in universal acceptance as against the western concept of tolerance.

The RSS functionary on Thursday released a book here named "Hindutva in the changing times". The book launch event was also attended by senior RSS functionary Krishna Gopal.

Nandakumar, who has attacked the Mamata Banerjee government in his book for alleged "Islamisation of West Bengal", told IANS: "We have to see whether we need to put up a board of being secular, or that whether we should prove this through our behaviour, actions and roles."

It is for society to take a call on this, rather than by any political class, on whether the preamble to the Indian Constitution should continue to have the word "secular" in it or not, he added.

In between signing his books and obliging wannabe Hindutva cadres with selfies, Nandakumar said that the very existence of the word "secular" in the preamble was not necessary and how the constitution founders too were against it.

"Baba Saheb Ambedkar, Ladi Krishnaswamy Aiyaar -- all debated against it and said it (secular) wasn't necessary to be included in the preamble. That time it was demanded, discussed and decided not to include it," he said.

Ambedkar's opinion was, however, disregarded when Indira Gandhi "bulldozed" the word "secular", in 1976, said the head of the Prajna Pravah, an umbrella body of several right-wing think-tanks

As Nandakumar prepared to return to his base in Kerala, where, he emphasises, the RSS has its work cut out in the "fight against the Kunnor model", he said that the inclusion of "secular" was done with the intent to damage the concept of Hindutva.

"It was to demolish, destroy the overarching principle of Hindutva that binds us together", he said.

Asked whether the Sangh would pressurise the BJP, which has 303 seats in the Lok Sabha, to omit "secular" from the Constitution preamble, Nandakumar smilingly refused to reply.