Sonia Gandhi discharged after 11 days in hospital

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.

Feb 26: In his first reaction to incidents of violence in Delhi which have left at least 20 people dead, Prime Minister Narendra Modi on Wednesday appealed for peace and brotherhood, and said he has held an extensive review of the prevailing situation in various parts of the national capital.

He also said it was important that calm and normalcy was restored at the earliest.

“Had an extensive review on the situation prevailing in various parts of Delhi. Police and other agencies are working on the ground to ensure peace and normalcy,” Modi tweeted.

Stressing that peace and harmony are “central to our ethos”, Modi said, “I appeal to my sisters and brothers of Delhi to maintain peace and brotherhood at all times.”

At least 20 people have been killed since Sunday in communal violence in Northeast Delhi, triggered after clashes between pro and anti-CAA protestors over the Citizenship (Amendment) Act.

New Delhi, Feb 29: The father of Intelligence Bureau staffer Ankit Sharma, whose body was pulled out of a drain in northeast Delhi's riot-hit Chand Bagh, complained to police that goons had assembled at the residence of former AAP counselor Tahir Hussain and were throwing petrol bombs from the rooftop.

According to the FIR which was registered on Thursday on the basis of the complaint lodged by Ankit's father Ravinder, the goons were also firing from the rooftop.

On Tuesday, Ankit returned from his office at 5 pm and then went outside to buy groceries. When he did not return, the family started looking for him and later filed a missing report, the FIR stated.

They got to know from their neighbours that a body has been recovered from a drain… later it was found to be that of Anikt, it said, adding the body had multiple stab injuries on the face, head, back, and chest.

The family has alleged in the FIR that it was Hussain and the goons at his residence who killed Ankit. In the FIR, Hussain has been accused of murder, destruction of evidence and abduction.

Soon after the FIR was registered on Thursday, the AAP suspended Tahir Hussain from the primary membership of the party till the police completed its probe.

The death toll in Delhi's communal violence rose to 42 on Friday as the situation showed some signs of returning to normalcy and clouds of smoke cleared to reveal the extent of the damage from the worst riots in the city in over three decades.

A total of 148 FIRs have been registered and 630 people have been either arrested or detained so far in connection with the communal violence, a Delhi Police spokesperson said.