India, US seal first commercial deal on civil nuclear power

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.

Thiruvananthapuram, Apr 11: The effective handling of Covid-19 pandemic by the Kerala Government has received a big endorsement in the International media with the latest being a report in Washington Post which suggests that the State’s success could prove instructive to the entire country.

The Washington Post quoted Kerala Health Minister K K Shailaja Teacher as saying “We hoped for the best but planned for the worst. Now, the curve has flattened, but we cannot predict what will happen next week.”

"The Minister said six states had reached out to Kerala for advice. She, however, noted that it might not be easy to replicate Kerala’s lessons elsewhere," according to the Minister's office quoting the report here on Saturday.

New Delhi, Mar 26: The total number of people who have been confirmed positive for COVID-19 in India has risen to 649 in India, including 593 active cases and 42 people who have been cured or discharged from hospitals, according to the recent update by the Union Ministry of Health and Family Welfare (MoHFW) on Thursday morning.
The death toll due to the novel coronavirus in the country has reached 13, the official data reported. There have been 3 more deaths due to COVID-19 reported in the country since last evening.
An 85-year-old woman in Gujarat died yesterday while with the passing away of a 65-year-old woman, Madhya Pradesh reported its first COVID-19 death. Tamil Nadu also reported its first death in the state yesterday due to the deadly infection.
According to report from the Indian Council of Medical Research (ICMR) India had tested 24,254 people as of 8 p.m. on March 25.
The country is now in its second day of a 21-day lockdown that was announced by the Prime Minister Narendra Modi on Tuesday to deal with the spread of coronavirus, saying that "social distancing" is the only option to deal with the disease, which spreads rapidly.
The central government had on Wednesday announced that it will provide 7 kg ration to 80 crore people in India. The Centre also said that it has earmarked Rs 1.80 lakh crores for providing wheat at Rs 2 per kg and rice at Rs 3 per kg
"Union Cabinet has decided to provide wheat at Rs 2 per kg which is worth Rs 27 per kg and rice at Rs 3 per kg which is worth Rs 37 per kg. A total amount of Rs 1 lakh 80 thousand crores is being spent for the cause. The amount will be given in advance to the states for the coming 3 months," Union Minister Sadananda Gowda said yesterday.
Those shops which are catering to essential services will continue doing so during the 21-day nationwide lockdown.