Christian missionaries a threat to unity of the country: BJP MP

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.

Puducherry, Jan 5: Puducherry Lt Governor Kiran Bedi, a former IPS officer, became the butt of Twitterati jokes on Saturday after she tweeted that NASA recording of the sound of the sun was in fact 'Om' chant. She wrote at @thekiranbedi: "NASA recorded sound of the sun -- Sun chants Om."

pic.twitter.com/ArRwljjDVE

— Kiran Bedi (@thekiranbedi) January 4, 2020

The post got 5.6K retweets and 17.7K likes, and as many as 472.6K views.

One user remarked: "Wrong. The Sun said NaMo NaMo. You should've checked the UNESCO version along with the NASA version."

A post read: "And we thought you were intelligent."

One user posted a picture of Kiran Bedi with Sadhguru Jaggi who was trolled a few days ago after he posted his support on the Citizenship Amendment Act. He commented: "This picture can be provided."

A Twitter user reminded the former bureaucrat about the Indian Constitution's Fundamental Duties (Article 51A) that says that it shall be the duty of every citizens of India to develop scientific temper, humanism and the spirit of inquiry and reform.

Another wondered aloud: "We don't know how you cleared the Civil Services exams. We are ashamed...."

A user posted a clip of a well known stand-up comic who talked about the celestial hum which many claim to be Om chant.

A post read: "I consider this tweet by you as one of the best jokes of the millennium. The saffron brigade is successful in brainwashing learned people like you."
One user commented: "Once upon a time this lady was a hero to many. What a disgrace now!"

New Delhi, Mar 16: A total of 110 cases of coronavirus, including 17 foreign nationals have been confirmed across India, Union Ministry of Health and Family Welfare said on Sunday.

The maximum positive cases have been reported from Maharashtra (32), followed by Kerala (22).

The total number of passengers screened at airports is 12,76,046, the ministry said.

The World Health Organisation (WHO) has declared that Europe has become the new 'epicentre' of the coronavirus pandemic that has infected more than 15 lakh people with over 6,000 deaths globally.

The virus had first emerged in China's Wuhan city in December last year.