We are monitoring situation in Sri Lanka: Sushma Swaraj

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.

New Delhi, Mar 13: Delhi's Tis Hazari Court on Friday sentenced expelled Bharatiya Janata Party (BJP) MLA Kuldeep Singh Sengar and six others to 10 years imprisonment for the death of Unnao rape survivor's father. Sengar is already serving life imprisonment for raping the minor.

While sentencing them, District Judge Dharmesh Sharma said, "There can be no denying that rule of law was broken. Sengar was a public functionary and had to maintain the rule of law. The way the crime has been committed, it does not call for leniency."

Sengar and his brother Atul has been directed to give 10 lakh compensation to family of the victim for loss of their father. "There are four minor children involved, three girls and one boy. They have also been uprooted from native place," the judge said.

Seven people, including Sengar, his brother and two police personnel, were held guilty for culpable homicide and criminal conspiracy, earlier this month.

The case pertains to the death of rape survivor's father in custody on April 9, 2018. It was alleged that he was assaulted following a quarrel with some of the accused in the case.

He was taken to the police station and then framed for allegedly possessing an illegal firearm. Pursuant to this, he was sent to custodial remand, during which he died.

The case was transferred to Delhi from a trial court in Uttar Pradesh on the Supreme Court's directions in August last year. Both the death and illegal firearm case was later clubbed by the court.

During the arguments on sentencing on March 12, Sengar had told the court that he should be "hanged and acid poured into his eyes if he has done anything wrong".

The former MLA had also raped the daughter of the deceased in 2017 in Uttar Pradesh's Unnao district and was sent to jail for "remainder of his natural biological life", last year.

New Delhi, May 25: Mahindra Group Chairman Anand Mahindra on Monday said lockdown extensions are not just economically disastrous but also create another medical crisis.

While acknowledging that choices are not easy for policymakers, he said a lockdown extension will not help.

"Lockdown extensions aren't just economically disastrous, as I had tweeted earlier, but also create another medical crisis," Mahindra said in a tweet.

He was referring to an article that highlighted "the dangerous psychological effects of lockdowns & the huge risk of neglecting non-COVID patients".

Mahindra, who had earlier proposed a comprehensive lifting after 49 days of lockdown, further said, "The choices aren't easy for policy makers but a lockdown extension won't help".

He said, "The numbers (coronavirus cases) will continue to rise & the focus must be on rapid expansion of field hospital beds with oxygen lines".

He further said, "The army has enormous expertise in this".

On March 22, before the government announced nationwide lockdown, Mahindra had proposed such a move expressing concerns over reports that India was likely to have already reached stage 3 of coronavirus transmission.