BJP will eliminate any remnants of corruption in its second term: Swamy

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 19: The UIDAI on Tuesday said its Hyderabad office has sent notices to 127 people for allegedly obtaining Aadhaar numbers on "false pretences" but asserted these have nothing to do with citizenship.

The notices were issued after reports from the police, the Unique Identification Authority of India (UIDAI) said.

"Aadhaar is not a document of citizenship and UIDAI has been mandated under the Aadhaar Act to ascertain residency of a person in India for 182 days prior to applying for Aadhaar," the nodal body, which issues the 12-digit biometric ID, said in a statement.

The Supreme Court, in its landmark decision, has directed the UIDAI not to issue Aadhaar to illegal immigrants, it said.

"It may be noted that the regional office Hyderabad received reports from the state police that 127 people have obtained Aadhaar on false pretences, as in their preliminary enquiry they were found illegal immigrants who were not qualified to obtain an Aadhaar number," the UIDAI said.

As per the Aadhaar Act, such Aadhaar numbers are liable to be cancelled.

"Therefore, the regional office Hyderabad has sent notices to them to appear in person and to substantiate their claims for getting an Aadhaar number," it said.

The UIDAI emphasised that these notices have "nothing to do with citizenship and cancellation of Aadhaar number is in no way related to the nationality of any resident".

In case it is found and proved that any of them obtained Aadhaar by submitting false documents or through false pretences, their Aadhaar is liable to be cancelled or suspended depending on the severity of the transgression, UIDAI said.

"Severe errors like forged documents, etc., will lead to appropriate actions, including suspending /cancelling the Aadhaar," it cautioned.

"Sometimes it becomes necessary to cancel the Aadhaar number when it is found that a resident has obtained it by submitting false biometrics or documents. It is a routine quality improvement process that the UIDAI takes up regularly," the authority said.

The 127 people have been asked to appear before the UIDAI deputy director in Hyderabad for a personal hearing on February 20.

Additional time has been given to allow them to collect the requisite documents, "Since it may take them some more time to collect the original documents that they had submitted for obtaining Aadhaar, as informed by the state police, the UIDAI has postponed the personal hearing to May 2020," it added.