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Air Pollutants Can Be Stopped If They Are Frozen : Scientists

The air-quality across the NCR was very poor

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India's Rashtrapati Bhawan, or the Presidential Palace is partly visible due to smog as traffic plies on Rajapth, the ceremonial boulevard in New Delhi. VOA
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Freezing pollutants can prevent deadly outdoor air pollution — thought to cause more than three million premature deaths worldwide every year — from seeping indoors by 99 per cent, scientists have discovered.

The research, by a team of scientists from the Nottingham Trent University in the UK and the Chinese Academy of Sciences, involved studying the effectiveness of cryogenics for indoor air purification, by removing the gaseous pollutants and tiny particulates caused by haze.

The team found that as they circulated haze-polluted air through a cryogenic condenser, the finer particles stuck together in the condenser tube before dropping out by gravity, and emerging as clean air.

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A man wearing a respiratory protection mask walks toward an office building during the smog after a red alert was issued for heavy air pollution in Beijing’s central business district, China. VOA

Their method was able to remove 99 per cent of particulates and 98 per cent of nitrogen oxide pollutants.

“Hazardous outdoor air pollution has severely affected indoor air quality, threatening the health of billions of people,” said Professor Robert Mortimer, Dean of the School of Animal, Rural and Environmental Sciences at Nottingham.

“Outdoor air pollution in cities is a global problem. While there are some existing technologies to purify indoor air, they can be inefficient, expensive or produce harmful by-products.

“When outdoor air quality is poor, people tend to spend even more time indoors – but outdoor pollution also leads to indoor pollution and people are still impacted.”

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In this Sept. 19, 2018 photo steam and cooling towers of a lignite power plant are reflected in a pond in Peitz, eastern Germany. VOA

The experiments, reported in the journal Science of the Total Environment, showed that by simply circulating polluted air through a small freezing chamber we can remove most of the fine particles and gas pollutants.

“Our study makes it possible to add an ‘air cleaner’ option to household appliances in areas which might experience extremely poor air conditions. By controlling indoor air pollution and improving air quality in this way, this work could be greatly beneficial for public health,” added Gang Pan, Professor at the varsity.

It is hoped that the work could pave the way for simple modification of air conditioning and humidifier units so that they can also clean polluted indoor air, the team said.

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Air pollution can also damage your kidneys. wikimedia commons

Delhi and the National Capital Region (NCR) on Sunday witnessed “very poor” air quality with the minimum temperature recorded at 12.4 degrees Celsius, two notches below the season’s average.

Also Read: Delhi’s Air Quality Leads to Ban On Truck And Construction

The air-quality across the NCR was very poor, according to System of Air Quality and Weather Forecasting And Research.

The humidity at 8.30 a.m. was 87 per cent. The maximum temperature was likely to hover around 28 degrees Celsius. (IANS)

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Air Pollution Worsens In Western Balkan Cities

Activists say the funds allocated are insufficient and that the government's response is inadequate.

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Smog, Air pollution
General view of the city as smog blankets Sarajevo, Bosnia and Herzegovina. VOA

When winter arrives in the Western Balkans, it is not unusual for dense smog to envelop its cities, making it hard to breathe and impairing visibility. But this year, air pollution levels are among the highest in the world and public anger is on the rise.

In recent days, the Bosnian, Macedonian and Kosovar capitals topped the charts of the world’s most polluted cities as the smog intensified due to heavy traffic, excessive use of coal, poor spatial planning and solid fuel based heating.

The air quality index measured by the U.S. Embassy in Sarajevo hit 383 on Tuesday, a level identified by the World Health Organization (WHO) as hazardous to health and almost 10 times the average. In Pristina, the index registered 415 on Monday night and marked air quality in several Macedonian towns as very poor.

“This is all the result of a situation in which political elites treat the city as a construction plot which should be occupied at all costs rather than a place where people live,” Anes Podic of Sarajevo’s Eko Akcija environmental group said.

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The sun is seen through evening air pollution, Feb. 8, 2018. VOA

“You can feel how bad the air smells even inside the car or home,” said a taxi driver Mirsad Pobric.

According to the WHO, pollution costs Bosnia the equivalent of more than a fifth of its annual gross domestic product (GDP) every year — around $3.9 billion — in lost work and school days, healthcare and fuel costs.

Macedonia loses an equivalent of 3.2 percent of GDP a year to pollution, the World Bank said in a report, more than$360 million a year.

As a way of bringing more attention to the issue, the Embassy of Sweden has been using red lighting on its facade in central Sarajevo to reflect air quality each day. The deeper the red, the worse the pollution.

According to the WHO, 230 Bosnians die of air pollution per 100,000 citizens a year, compared to 0.4 in Sweden. The World Bank estimates that in Macedonia there are 1,350 deaths related to air pollution per year.

Air pollution
Sweden has launched a four-year project in Bosnia that will bring together experts from its Environmental Protection Agency .Wikimedia Commons

“Pollution is killing people of Bosnia and Herzegovina, therefore something really needs to be done,” Swedish Ambassador Anders Hagelberg told Reuters.

As part of efforts to combat the issue, Sweden has launched a four-year project in Bosnia that will bring together experts from its Environmental Protection Agency and local hydro-meteorological agencies and governments.

The aim of the program is to help improve air quality monitoring but also to bring more investment into energy efficiency.

Also Read: U.N. Chief Warns The World About Not Doing Enough To Prevent Climate Change

Macedonia has launched its own program to combat air pollution to which the government allocated 1.6 million euros ($1.83 million) in next year’s budget. It aims to halve Skopje’s air pollution within two years by reducing taxes for central heating, restricting traffic and introducing stricter control of industrial emissions.

Activists say the funds allocated are insufficient and that the government’s response is inadequate. (VOA)