Women activists enter Trimbakeshwar temple's inner sanctum

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, May 30: As the NDA government completes one year of its second term, Prime Minister Narendra Modi listed several achievements and initiatives taken by his government in the past year in an audio message addressed to the people of the country.

PM Modi said, "This day last year began a golden chapter in the history of Indian democracy. It was after several decades that the people of the country voted back a full-term government with a full majority."

"Your role has played a pivotal role in creating this chapter. In such a situation, this day is an opportunity for me to bow to the citizens of the country and the democratic ethos of our nation," said PM Modi.

"Had the situation been normal, I would have got the chance to meet you. Your affection and active support in the past year have given me new energy and inspiration. During this period, the way you have shown the collective powers of democracy, they have become an example for the whole world," he added.

PM Modi talked about several important initiatives taken by his government in 2014 as well as India's demonstration of its mettle through the surgical strike and airstrike.

"Six years ago in 2014, the people of this country voted to bring a major change in the country. You voted to change the country's policy and manner. During that tenure where surgical strike and airstrike took place, one rank one pension, one nation one tax GST, and better MSP for farmers were also fulfilled. That period was dedicated to fulfilling many needs of the country."

He further said that in these years the country has seen systems coming out of the quagmire of inertia and corruption. The country has seen governance change to make life easier for the poor.

"During that period, India's stature in the world increased. By opening bank accounts of poor people, by giving them gas connections, by providing free electricity connections, by building washrooms, by building houses, the dignity of the poor has also been increased," said PM Modi.

Hyderabad, Jun 20: IAF Chief Air Chief Marshal RKS Bhadauria on Saturday said that the force is well prepared and suitably deployed to respond to any contingency and it will never let the sacrifice of the bravehearts of Galwan go in vain.

"It should be very clear that we are well prepared and suitably deployed to respond to any contingency. I assure the nation that we are determined to deliver and will never let the sacrifice of the braves of Galwan go in vain," IAF Chief Air Chief Marshal Bhadauria said here.

Bhadauria was speaking at the Combined Graduation Parade (CGP) at Air Force Academy in Hyderabad.

His remarks come days after 20 Indian soldiers lost their lives in the violent face-off on June 15-16 during an attempt by the Chinese troops to unilaterally change the status quo during the de-escalation in eastern Ladakh.

Speaking about the current border situation with China, he said: "We are aware of the situation, be it on LAC or beyond, be it their air deployments, their posture and kind of deployments. We've full analysis and we have taken necessary action that we need to take to handle any contingency that may come up."

"We are monitoring all the moments and we are aware of the full situation," he added.

He further said that in spite of the "unacceptable Chinese action" at Galwan Valley in eastern Ladakh, which claimed lives of 20 Indian Army personnel, efforts are underway to ensure that the current situation at the Line of Actual Control (LAC) is resolved peacefully.

He asserted that the IAF is determined to deliver and the development at the LAC in Ladakh is a small snapshot of what the force is required to handle at short notice.

The IAF Chief further appealed to people to join him in paying tribute Colonel Santosh Babu and his brave men who made the sacrifice while defending the LAC in Galwan valley.

"The gallant actions in a highly-challenging situation have demonstrated our resolve to protect India's sovereignty at any cost," the Indian Air Force (IAF) chief said.