Filing review petition will harm Hindu-Muslim unity, claims Rizvi

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.

Mar 19: Amidst spiralling cases of COVID-19 in the country, Union Minister of State for Health and Family Welfare Ashwini Kumar Choubey on Thursday advocated "absorbing sunlight" as a possible precaution against coronavirus that has claimed over 8,000 lives globally.

Speaking to reporters outside parliament, Choubey said 10-15 minutes in the sun would build immunity as sunlight provides Vitamin D.

"From 11 am to 2 pm the sun is shining brightly. We should spend at least 10-15 minutes to absorb sunlight so that we get vitamin D which improves the immunity of our body and also kills such viruses. All should be aware of (this fact)," he said when asked about the spread of coronavirus.

COVID-19 cases in India climbed to 169 on Thursday after 18 fresh cases were reported from various parts of the country, according to the Union health ministry.

The cases include 25 foreign nationals -- 17 from Italy, 3 from the Philippines, two from the UK, one each belonging to Canada, Indonesia and Singapore.

The figure also includes three deaths reported from Delhi, Karnataka and Maharashtra so far.

According to the World Health Organisation, the novel coronavirus has killed over 8,000 people globally and infected more than two lakh.

Lucknow, Jan 21: Defending his brainchild, the Citizenship Amendment Act (CAA), Union home minister Amit Shah on Tuesday said the new law will not be scrapped despite the countrywide protests against it.

Addressing a rally here to drum up support for the CAA, Shah also declared that construction of a Ram temple "touching the skies" in Ayodhya will begin within three months.

He said there is no provision in the amended law for taking anyone's citizenship away. "A canard is being spread against the CAA by the Congress, SP, BSP, and Trinamool Congress. The CAA is a law to grant citizenship," he added.

"I want to say that irrespective of the protests this will not be withdrawn," he added.

Shah challenged Congress leaders to hold a discussion with him on CAA at a public forum.

He named Congress leader Rahul Gandhi, Samajwadi Party's Akhilesh Yadav, Bahujan Samaj Party's Mayawati and TMC chief Mamata Banerjee while throwing the "challenge".

Congress has become blind due to vote bank politics,"he said. He also blamed the Congress for Partition.