Air pollution discolouring Taj Mahal, finds study

December 11, 2014

Washington, Dec 11: A team of researchers from India and the US has found that the browning of the Taj Mahal's iconic marble dome and soaring minarets is due to dust and airborne carbon particles.taj mahal

"Our team was able to show that the pollutants discolouring the Taj Mahal are particulate matter: carbon from burning biomass and refuse, fossil fuels, and dust - possibly from agriculture and road traffic," said Michael Bergin, professor at the Georgia Institute of Technology in the US.

Attracting millions of visitors each year, the Taj Mahal became a UNESCO World Heritage Site in 1983.

Beginning in the 1970s, observers noted a brownish cast to the white marble that makes up the structures.

For the study, the researchers used air sampling equipment to measure what was in the air in the Taj Mahal complex from November 2011 through June 2012.

In addition, they also placed small samples of pristine marble onto the Taj Mahal at various locations near the main dome.

After exposure to air pollutants over a two-month period, the researchers found particles of dust, brown organic carbon and black carbon in the filters and on the marble samples.

The carbon particles come from a variety of sources, including fuel combustion, cooking and brick-making, trash and refuse burning and vehicle exhaust.

The dust may come from local agricultural activities and vehicular traffic - or from distant sources.

Now that researchers know what's discolouring the Taj Mahal, the next step will be to identify the sources of the particles and plan control strategies.

The sources could be local - and the government has already taken steps to reduce vehicle and industrial emissions in the area - or the particles could be coming from longer distances away from the region, the authors pointed out.

"Some of these particles are really bad for human health, so cleaning up the Taj Mahal could have a huge health benefit for people in the entire region," Bergin concluded.

In addition to Georgia Institute of Technology and University of Wisconsin in the US, researchers from the Indian Institute of Technology at Kanpur (IIT-K) and Archaeological Survey of India (ASI) collaborated on the project. The study appeared in the journal Environmental Science & Technology.

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News Network
January 14,2020

Chennai/New Delhi, Jan 14: India's annual electricity demand in 2019 grew at its slowest pace in six years with December marking a fifth straight month of decline, government data showed, amid a broader economic slowdown that led to a drop in sales of everything from cars to cookies and also to factories cutting jobs.

Electricity demand is seen as an important indicator of industrial output in the country and a sustained decline could mean a further slowdown in the economy.

India's power demand grew at 1.1% in 2019, data from the Central Electricity Authority showed, the slowest pace of growth since a 1% uptick seen in 2013. The power demand growth slowdown in 2013 was preceded by three strong years of consumption growth of 8% or more.

In December, the country's power demand fell 0.5% from the year-earlier period, representing the fifth straight month of decline, compared with a 4.3% fall in November.

But in India's western states of Maharashtra and Gujarat, two of India's most industrialised provinces, monthly demand increased.

In October, power demand had fallen 13.2% from a year earlier, its steepest monthly decline in more than 12 years, as a slowdown in Asia's third-largest economy deepened.

Industry accounts for more than two-fifths of India's annual electricity consumption, while homes account for nearly a fourth and agriculture more than a sixth.

The slower demand growth is a blow for many debt-laden power producers, who are facing financial stress and are owed over $11 billion by state-run distribution companies.

India's overall economic growth slowed to 4.5% in the July-September quarter, government data released in November showed, the weakest pace since 2013 as consumer demand and private investment fell.

The government has estimated growth in the current financial year that runs through to March will be the slowest since the 2008 global crisis.

"This reflects overall economic slowdown, because if you look at other high frequency data like diesel consumption, everywhere you are seeing contraction," Rupa Rege Nitsure, chief economist at L&T Financial Holdings.

But India's central bank will not have much scope to cut rates to stimulate the economy because inflation has been rising sharply and reached 7.35% in December compared with 1.97% in January last year.

Economists say India's growth will continue to hover around 4.5% levels in the Oct-Dec quarter.

"In the Oct-Dec quarter as well growth (GDP) will be around the same level as July-September. My estimate for the full year is around 4.7% growth," Nitsure said.

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Agencies
July 2,2020

Lucknow, Jul 2: Senior BJP leader Uma Bharti Thursday appeared in person before a special court here conducting trial in the 1992 Babri mosque demolition case.      

The special CBI court is currently recording the statements of 32 accused under CrPC section 313 (court's power to examine the accused), a stage in the trial that follows the examination of prosecution witnesses.

The 61-year-old saffron clad BJP leader is the 19th accused to depose before the court in the over 27-year-old case. Thirteen other alleged accused, including former deputy prime minister LK Advani and senior BJP leaders MM Joshi and Kalyan Singh are yet to be examined at this stage. Their lawyers have indicated to the CBI court that they prefer to appear through video conferencing. 

The mosque in Ayodhya was demolished in December 1992 by 'kar sevaks' who claimed that an ancient Ram temple had stood on the same site. The CBI court is conducting day-to-day hearings to complete the trial by August 31, as directed by the Supreme Court.

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News Network
April 6,2020

New Delhi, Apr 6: With an increase of 490 cases in the last 12 hours, the total number of COVID-19 positive cases in India climbed to 4067, said Ministry of Health and Family Welfare on Monday.

As many as 109 deaths have been reported across the country due to the deadly disease.
There are 3666 active cases in the country while 292 people have been cured/discharged/migrated.

Maharashtra has reported the highest number of COVID-19 cases so far, standing at 690, followed by Tamil Nadu and Delhi with 571 and 503 cases respectively. 

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