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Thiruvananthapuram, Feb 21: Hindu temples, dedicated to Lord Shiva, witnessed heavy rush on Friday as devotees celebrated Maha Shivratri festival with traditional zeal and religious fervour across Kerala.

Cutting across age barriers, devotees, including women and children, thronged small and big shrines since early morning to offer prayers and take part in special poojas and rituals on the occasion.

Devotees used to mark the auspicious occasion by observing 'orikkal' (fasting), dedicating the leaves of Koovalam plant, which is considered holy according to Hindu tradition, to the Lord and by abandoning their sleep chanting 'Om Nama Shivaya' mantras.

Ardent devotees even remain awake throughout the night and spend their whole day in temples.

The Sreekandeswaram Mahadeva Temple here, Vadakkunnathan temple in Thrissur and Maha Deva temple in Vaikom were among the major shrines which witnessed heavy rush since early morning.

Temple authorities, especially Devaswom Boards which manage many major shrines in the state, have made elaborate arrangements in Shiva temples to ensure smooth darshan for devotees.

All arrangements have been put in place on the banks of River Periyar in Aluva in Ernakulam for 'Balitharppanam', a ritual in which people pay obeisance to their ancestors.

Performing the ritual on the midnight of Shivratri is considered auspicious by devotees.

Hundreds of 'bali taras' (specially erected platforms) have been set up on the banks of the river to perform the ritual and a large number of priests have been deployed to assist devotees.

Thousands of police personnel were deployed in view of the large turnout of devotees.

New Delhi, Jun 26: With the highest single-day spike of 17,296 COVID-19 cases reported in the last 24 hours, India's COVID-19 count reached 4,90,401 on Friday, said the Union Ministry of Health and Family Welfare (MoHFW).

The country also saw 407 deaths in the last 24 hours, which pushed the death toll to 15,301.

The total number of cases includes 1,89,463 active cases, 2,85,637cured/discharged/migrated cases, as per the MoHFW.

According to the Indian Council of Medical Research (ICMR), the total number of samples tested up to June 25 is 77,76,228; the number of samples tested on 25 June is 2,15,446.

Maharashtra remains the worst-affected state in the country with 1,47,741 cases. The active cases in the state are 63,357. The number of people cured or discharged stands at 77,453 while the death toll is at 6,931.

Delhi has so far reported 73,780 cases. The active cases in the national capital stood at 26,586. While the cured and discharged numbers stood at 44,765. The death toll in the city is 2,429.

Tamil Nadu has so far reported 70,977. With active cases at 30,067 and the number of cured or discharged at 39,999, while the death toll stood at 911.

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.