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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, Feb 10: The government is set to privatise Central Electronics Ltd, a CPSE under the Department of Science and Technology, by selling its 100% stake with management control and has invited the Expression of Interest for the same by March 16.

The selected bidder will be required to lock in its shares for a period of three years during which it cannot undertake the sale of its stake in CEL, the PIM (Preliminary Information Memorandum) said.

"The government of India has 'in-principle' decided to disinvest 100 per cent of its equity shareholding in CEL (which is equivalent to 100 per cent of the total paid up equity share capital of CEL) through Strategic Disinvestment with transfer of management control (Strategic Disinvestment or Transaction)," DIPAM, the Disinvestment Department, said.

The process for the transaction has been divided into two stages, namely, Stage I and Stage II.

After BPCL and Air India, this is yet another CPSE which government is slated to privatise if it gets offers from bidders.

The government has set a challenging target of Rs 2.1 lakh crore disinvestment proceeds from CPSE sell-offs and IPOs, OFSs (Offer for sale) in the next fiscal and it going out all guns blazing to meet that target after revising this fiscal target of Rs 1.05 lakh crore to Rs 65,000 crore.

The Interested Bidders (which can also include employees of CEL) must have a minimum net worth of Rs 50 crore as on March 2019. DIPAM has released complete invitation Preliminary Information Memorandum (PIM) of CEL. Resurgent India Limited is the advisor to the Transaction.

CEL is a pioneer in the country in the field of Solar Photovoltaic (SPV) with the distinction of having developed India's first Solar cell in 1977 and first Solar panel in 1978 as well as commissioning India's first solar plant in 1992.

More recently, it has developed and manufactured the first crystalline flexible solar panel especially for use on the passenger train roofs in 2015.

Its solar products have been qualified to International Standards IEC 61215/61730. CEL is further working on development of a range of new and upgraded products for signaling and telecommunication in the railway sector.

In the SWOT analysis of the CPSE, DIPAM has stated under weakness that "the company has weak financial loss due to past losses, high manufacturing cost and non payment of dues by state nodal agencies affecting the financial position of the company".

The CPSE has adequate land for expansion, the SWOT analysis said adding "the CPSE faces threat of dumping of solar cells at very low rates which makes solar PV manufacturing industry unviable".

Entry of new players in the market for solar products and railway signalling systems also is cited as a threat.

New Delhi, Jul 9: India reported the highest single-day spike of 24,879 new positive cases and 487 deaths in the last 24 hours, taking the total number of COVID-19 cases in the country to 7,67,296, according to the Union Ministry of Health and Family Welfare.

Out of the total number of cases, 2,69,789 are active, 4,76,378 have been cured/discharged/migrated and 21,129 have died.

Maharashtra remains the worst-affected state due to COVID-19 with as many as 2,23,724 cases, including 91,084 active, 1,23,192 cured/discharged and 9,448 deaths.

It is followed by Tamil Nadu (1,22,350) and Delhi (1,04,864).

Meanwhile, a total of 1,07,40,832 samples have been tested for COVID-19 till July 8. Of these, 2,67,061 samples were tested yesterday, stated Indian Council of Medical Research (ICMR).