President and PM condole the death of Balasaheb Thackeray

New Delhi, Jun 28: With 19,906 new cases, highest single-day spike so far, India's COVID-19 count touched 5,28,859 including 2,03,051 active cases, 3,09,713 cured/discharged/migrated, according to the Ministry of Health & Family Welfare.

410 deaths were reported in the last 24 hours and the cumulative toll reached 16,095 deaths.

Coronavirus cases in Maharashtra have climbed to 1,59,133 while Delhi's tally stands at 80,188.

2,31,095 samples were tested yesterday and the total number of samples tested up to 27 June is 82,27,802, according to the Indian Council of Medical Research (ICMR).

Sangod, May 1: Claiming that "drinking alcohol will surely remove coronavirus from the throat", Congress MLA from Sangod, Bharat Singh Kundanpur, has in a letter to Chief Minister Ashok Gehlot urged the reopening of liquor stores in the state, which have been closed in the wake of nationwide lockdown.

"When coronavirus can be removed by washing hands with alcohol, then drinking alcohol will surely remove virus from the throat," Kundanpur wrote in his letter dated April 30.

He also alleged that the sale of illegal liquor and bootlegging had become rampant in the state due to the closure of liquor stores during the lockdown.

Prime Minister Narendra Modi had on March 24 announced a 21-day nationwide lockdown as a precautionary measure to contain the spread of COVID-19. The lockdown was later extended till May 3.

As many as 2,617 COVID-19 cases have been reported in Rajasthan, as per the latest update by the state Health Department.

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.