BJP annoyed over Rahul Gandhi’s remarks against terrorism

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, Jun 19: RJD and AAP were not invited to the all-party meeting called by Prime Minister Narendra Modi on Friday to discuss the situation at the India-China border after 20 Indian soldiers were killed in a "violent face-off," leaving the parties fuming.

Top RJD leader Tejashwi Yadav criticised the government for not inviting the party to the meeting, asking on Twitter late Thursday night, "Just wish to know the criteria for inviting political parties for tomorrow's (Friday's) all-party meet on Galwan Valley. I mean the grounds of inclusion/exclusion. Because our party hasn't received any message so far."

AAP's Rajya Sabha leader Sanjay Singh joined the chorus, "there is a strange ego-driven government at the centre. AAP has a government in Delhi and is the main opposition in Punjab. We have four MPs. But on a vital subject, AAP's views are not needed? The country is waiting for what the Prime Minister will say at the meeting."

Sources said the government has set a criteria to invite only parties with five or more MPs in Parliament for the digital meet, where the Prime Minister will brief the top leaders of parties and hear their views on the way ahead. There are at least 27 parties in the Parliament, which have less than five members, while 17 have more than five members or more than five MPs.

Interestingly, RJD has five MPs in Rajya Sabha and its senior MP Manoj K Jha shared the Rajya Sabha website link on Twitter, which showed the party has five MPs. "We have not been invited and the government's bogus argument has been exposed," Jha said.

CPI leaders said General Secretary D Raja received a call from Defence Minister Rajnath Singh inviting him to the meeting and with a message that the Prime Minister's Office would coordinate but there was no follow-up after that.

"Exclusion of AAP and RJD in the all-party meet on a National debate does not augment well. AAP is ruling Delhi and has its CM. Why should people of Delhi be kept out in such an important debate on National integrity and Sovereignty?" former NCP MP Majeed Memon tweeted.

During the all-party meeting on COVID-19 too, the government had not called all parties with representation in Parliament to the all-party meeting in April and had set five MPs as a benchmark to be invited.

Raja had then written a letter to Modi demanding that the government should not get into "technicalities" and discuss the issue with all parties in Parliament.