16 students deported from US, ‘hassled’ at Hyderabad airport

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.

Indore, Jan 24: Around 80 Muslim leaders of the BJP in Madhya Pradesh on Friday resigned from the primary membership of the party in protest over the Citizenship (Amendment) Act, calling it a "divisive" measure.

One of the leaders, Rajik Qureshi Farshiwala, said around 80 Muslim partymen have resigned from the BJP's primary membership after writing to the newly-appointed national president, J P Nadda, on Thursday.

These leaders, who dubbed the CAA "a divisive provision made on religious grounds", include several office- bearers of the BJP's minority cell, he said.

"It was becoming increasingly difficult for us to participate in our community's events after the CAA came into existence (in December 2019).

"At these events, people used to curse us and ask us how long we plan to keep quiet on a divisive law like the CAA?" he said.

"Persecuted refugees of any community should get Indian citizenship. You cannot decide that a particular person is an intruder or a terrorist merely on the basis of religion," Farshiwala added.

In their letter, the Muslim leaders stated, "Citizens have right to equality under Article 14 of the Indian Constitution. But the BJP-led Central Government is implementing the CAA on religious grounds.

"This is an act of dividing the country and against the basic spirit of the Constitution."

Some of the leaders who have resigned are considered close to BJP general secretary Kailash Vijayvargiya.

When asked about the development, Vijayvargiya on Thursday evening said, "I am not aware of the matter. But we will explain (about the CAA) if a person is being misled."

New Delhi, April 6: India recorded the highest number of 704 positive cases of coronavirus in the past 24 hours, said the Union Ministry of Health and Family Welfare on Monday.

With these new cases, the total number of COVID-19 positive cases in India have now climbed to 4,281.

Total deaths stand at 111 including 28 new deaths. So far, 318 COVID-19 patients have been cured across the country.