Kejriwal's fresh salvo, claims CBI told to target Opposition

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.

Mumbai, Mar 6: A Rolls Royce car, paintings of famous artists M F Hussain and Amrita Sher-Gil, designer handbags and other luxury items belonging to fugitive diamond jeweller Nirav Modi garnered over Rs 51 crore in the second auction conducted on Thursday.

As many as 40 items went under the hammer on Thursday, which marks the completion of auction of assets seized by the Enforcement Directorate.

The auction was conducted by Saffronart on behalf of the deputy director, Enforcement Directorate, and was expected to garner a minimum of Rs 40 crore in proceeds.

A collection of 112 prized assets of Modi were put up for live and online auctions from March 3 to 5, which included major artworks by contemporary and modern Indian artists, designer handbags, luxury watches and cars.

While the online auction on March 3-4 garnered Rs 2.04 crore against the expected proceeds of Rs 52 lakh, the live auction on Thursday garnered Rs 51.41 crore more.

These assets, seized by the ED, were put on auction in an attempt to recover a part of the dues Modi owes to various banks.

According to officials from Saffronart, the ED would get Rs 53.45 crore from the proceeds of these two auctions.

The lots that went under the hammer included legendary painter MF Hussain's painting of 'Battle of Ganga and Jamuna- Mahabharata 12' which went for a record 12 crore, the highest price received so far for the painter's work.

Amrita Sher-Gil's rare 1935 painting 'Boys with Lemons', which was auctioned for the first time, sold for Rs 15.7 crore ($2.24 million).

V S Gaitonde's tranquil 1972 painting was sold for Rs 9.52 crore while Manjit Bawa's Untitled 1992 sold for Rs 6.16 crore. Modi's Rolls Royce Ghost witnessed a high demand, selling for twice its estimate at Rs 1.68 crore ($240,000).