As People Stay Home, Air Pollution In North India At 20-Year Low: NASA

News Network
April 23, 2020

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.

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News Network
January 14,2020

New Delhi, Jan 14: The curative petitions of Vinay Sharma and Mukesh, who were sentenced to death in the Nirbhaya gang rape and murder case, was on Tuesday rejected by a five-judge Supreme Court Bench led by Justice N.V. Ramana.

In a three-page order, the Bench concluded, after an in chamber consideration that began about 1.45 p.m., that there was no merit in their pleas to spare them from the gallows.

“We have gone through the curative petitions and relevant documents. In our opinion, no case is made out within the parameters indicated in the decision of this Court in Rupa Ashok Hurra versus Ashok Hurra. Hence, the curative petitions are dismissed,” the court held.

Curative is a rare remedy devised by a Constitution Bench of the Supreme Court in its judgment in the Rupa Ashok Hurra case in 2002. A party can take only two limited grounds in a curative petition - one, he was not heard by the court before the adverse judgment was passed, and two, the judge was biased. A curative plea, which follows the dismissal of review petition, is the last legal avenue open for convicts in the Supreme Court. Sharma was the first among the four convicts to file a curative.

The Bench also rejected their pleas to stay the execution of their death sentence and for oral hearing in open court.

Besides Justice Ramana, the Bench comprised Arun Mishra, Rohinton Nariman, R. Banumathi and Ashok Bhushan.

Curative petitions were filed in the Supreme Court by both convicts on January 9. The petitions had come just days after a Delhi sessions court schedulled the execution of all the four convicts in Tihar jail on January 22.

Sharma and Mukesh, in separate curative petitions, argued that there was a “sea change” in the death penalty jurisprudence since their convictions. Carrying out the death sentence on such changed circumstances would be a “gross miscarriage of justice”.

In his plea, Sharma said the Court had commuted the death penalty in several rape and murder cases since 2017, when it first confirmed the death penalty to the Nirbhaya convicts.

“fter the pronouncement of judgment in 2017, there have been as many as 17 cases involving rape and murder in which various three-judge Benches of the Supreme Court have commuted the sentence of death,” the petition contended.

The Supreme Court recently dismissed a review petition filed by Akshay Singh, another of the four four condemned men, to review its May 5, 2017 judgment confirming the death penalty. It also refused his plea to grant him three weeks' time to file a mercy petition before the President of India.

A Bench led by Justice R. Banumathi had said it was open for the Nirbhaya case convicts to avail whatever time the law prescribes for the purpose of filing a mercy plea.

Akshay (33), Mukesh (30), Pawan Gupta (23) and Sharma (24) had brutally gang-raped a 23-year-old paramedical student in a moving bus on the intervening night of December 16-17, 2012. She died of her injuries a few days later.

The case shocked the nation and led to the tightening of anti-rape laws. Rape, especially gang rape, is now a capital crime.

One of the accused in the case, Ram Singh, allegedly committed suicide in the Tihar jail. A juvenile, who was among the accused, was convicted by a juvenile justice board. He was released from a reformation home after serving a three-year term.

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News Network
May 18,2020

New Delhi, May 18: With the highest-ever spike of 5,242 new cases in last 24 hours, the total number of positive COVID-19 cases in India reached 96,169 on Monday, according to the Ministry of Health and Family Welfare.

With 157 deaths reported in the last 24 hours, the death toll has risen to 3,029, as per the latest update by the ministry.

Out of the total number of cases, 36,824 have been cured/discharged/migrated.

This comes a day after the nationwide lockdown, imposed as a precautionary measure to contain the spread of COVID-19, was extended till May 31.

Maharashtra remains the worst-affected state due to the virus with 33,053 cases, including 1,198 deaths. It is followed by Gujarat (11,379), Tamil Nadu (11,224) and Delhi (10,054).

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News Network
June 1,2020

New Delhi, Jun 1: India's COVID-19 tally on Monday witnessed its highest-ever spike of 8,392 cases, while 230 more deaths related to the infection were also reported in the last 24 hours, according to the Union Ministry of Health and Family Welfare (MoHFW).

The total number of coronavirus cases in the country now stands at 1,90,535 including 93,322 active cases, 91,819 cured/discharged/migrated and 5,394 deaths.

COVID-19 cases in Maharashtra continue to soar with the number reaching 67,655. Tamil Nadu's coronavirus count stands at 22,333 while cases in Delhi the number has reached 19,844

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