Rahul echoes Kejriwal on PM Modi allegation, BJP says no one trusts him

Thiruvananthapuram, Apr 20: Kerala Chief Minister Pinarayi Vijayan on Sunday alleged that efforts were being made to undermine the achievements of the state government in its fight against Covid-19 and said he was "ignoring" them as it was not the time for controversies.

The Opposition Congress has been raising allegations that a US-based company had been entrusted with the task of collecting data regarding the virus-infected patients in the state, in violation of fundamental rights.

"Many developed nations are in awe of the achievements of Kerala in its fight against Covid-19 pandemic. This is the speciality of Kerala model," Vijayan said. Referring to the data collection charge levelled by the opposition parties, Vijayan said some were engaged in slandering the state government.

"Those who think that the government should not have a reputation for effectively handling the coronavirus outbreak are engaged in slandering the state government. It has happened before, it's happening now also. This is not the time to go behind controversies. People are watching and they will evaluate," Vijayan said in his weekly interactive programme 'Naam munnott'.

He said he had decided to ignore such controversies. The ward-level committees, set up by the government for the anti-coronavirus fight, was collecting information of those under home isolation, elderly persons and those at the risk of the disease using a questionnaire in this regard and upload it on the server of the private agency. The Congress has alleged that the data, collected through the government machinery, was being uploaded not on the government server but on that of the foreign company.

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.