'Coal Blocks Were Given Away Like Handkerchief', Says PM, Slamming UPA

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, Jun 22: Defence Minister Rajnath Singh on Monday left for a three-day visit to Russia. Singh is likely to discuss the India-Russia defence and strategic partnership during the visit and also attend a military parade in Moscow to mark the 75th anniversary of the Soviet victory over Nazi Germany in the Second World War.

The visit comes days after the violent face-off with China in which 20 Indian Armymen were killed in Galwan valley in Ladakh.

"Leaving for Moscow on a three day visit. The visit to Russia will give me an opportunity to hold talks on ways to further deepen the India-Russia defence and strategic partnership. I shall also be attending the 75th Victory Day Parade in Moscow," the Defence Minister tweeted.

Defence Secretary Ajay Kumar is also accompanying the minister.

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.