Home Today's Paper Most Popular Video Gallery Photo Gallery
Subscription Blog Signin Register
Logo
Tuesday, January 22, 2019 01:38:27 PM
Follow Us On: Facebook Twitter Twitter Twitter Twitter

Air pollution may harm cognitive intelligence, study says

photo by

By
30th-Aug-2018       
Comments
Share your thought
Post a comment »
Read all () »

Life Desk :
Chronic exposure to air pollution could be linked to cognitive performance, a new study in China suggests. Researchers believe that the negative impact increases with age, and affects men with less education the worst. Over four years, the maths and verbal skills of some 20,000 people in China were monitored by the US-Chinese study.
Researchers believe the results have global relevance, with more than 80% of the world's urban population breathing unsafe levels of air pollution. However, while establishing a link between pollution and lower test scores, the study did not prove cause and effect.
The study - which includes researchers from Beijing's Peking University and Yale University in the US - was based on measurements of sulphur dioxide, nitrogen dioxide and particulates smaller than 10 micrometres in diameter where participants lived. It is not clear how much each of these three pollutants is to blame.
Carbon monoxide, ozone and larger particulates were not included in the study.
Described as an invisible killer, air pollution causes an estimated seven million premature deaths a year worldwide, according to the World Health Organization.
"We provide evidence that the effect of air pollution on verbal tests becomes more pronounced as people age, especially for men and the less educated," the study published on Monday in the Proceedings of the National Academy of Sciences said.
Pollution also increases the risk of degenerative diseases such as Alzheimer's and other forms of dementia, the study suggests.
"Our sample enables us to examine the impact of air pollution as people age. So our results across the life course are quite new," one of the co-authors, Xi Chen of the Yale School of Public Health, told the BBC.
In this study, researchers tested people of both sexes aged 10 and above between 2010 and 2014, with 24 standardised maths questions and 34 word-recognition questions.
Previous studies found air pollution had a negative impact on students' cognitive abilities.
This latest study matches with previous research," says Derrick Ho of Hong Kong Polytechnic who has worked on the health effects of extreme weather events like haze.
"What's new in this paper is the focus on the China scenario and the fact that it's a very detailed study compared to many other ones," he told the BBC. "Also the differentiation between gender and age in this detail is new."
Many pollutants are thought to directly affect brain chemistry in a variety of ways - for instance, particulate matter can carry toxins through small passageways and directly enter the brain.
One of the reasons the researchers suggest older men with less education were worst affected by chronic exposure to air pollution is because those subjects often work outdoor manual jobs.
"Our findings about the damaging effect of air pollution on cognition," the study concludes, "particularly on the aging brain, imply that the indirect effect on social welfare could be much larger than previously thought."
"For older persons (in our study those age 55-65 or 65+) the effects can be very difficult to mitigate given the long term cumulative exposure," Mr Xi says.
"This is very worrisome as we all know that people often have to make important financial decisions in old age, such as when we should retire, which health insurance plan is better."
The study suggests that while the research findings are specific to China, it can shed light on other developing countries with severe air pollution.
The authors point to the 98% of cities with more than 100,000 people in low- and middle-income countries that fail to meet WHO air quality guidelines.

-BBC

Tariff
Add Rate

News Archive

Inside The New Nation

Editorial »

The miseries of River Karnafuli must end


WITH alleged support from a section of officials, the encroachment of Karnafuli banks is still rampant by some powerful quarters flouting the High Court order.  Quoting investigation report done by the National River Conservation Commission (NRCC), the media yesterday reported that none of the 2,181 illegal structures has been removed ...

Cricket »

David Warner to undergo surgery on injured elbow


Banned former Australian vice-captain David Warner is expected to undergo minor surgery on his elbow Tuesday after returning home from the Bangladesh Premier League with an injury.Warner, alongside former skipper Steve Smith and batsman Cameron Bancroft, was suspended from international cricket over a ball-tampering scandal during a Test match in ...

Entertainment »

Will Kareena contest Lok Sabha Election 2019?


Kareena’s name has been proposed by two Congress leaders, Guddu Chouhan and Anas Khan, as a possible candidate for Bhopal parliamentary seat where the grand old party has not tasted success since 1984. Local leaders of the Congress in Madhya Pradesh’s Bhopal have demanded Bollywood actress Kareena Kapoor Khan be ...

Football »

Tuchel draws best out of me at PSG:Neymar


Neymar says his strong bond with Paris Saint-Germain coach Thomas Tuchel inspires the Brazilian forward to give his "life on the pitch", as the French giants gear up for a trip to Manchester United in the Champions League next month.Neymar, the world's most expensive player, scored twice in Saturday's record ...

International »

May to unveil new Brexit strategy


AFP :British Prime Minister Theresa May unveils her Brexit "Plan B" to parliament on Monday after MPs shredded her EU divorce deal, deepening the political gridlock 10 weeks from departure day.Britain will crash out of the European Union on March 29 unless MPs can force a delay or come up ...

Entertainment »

Munmun, Achol`s movie Ragi


Sheikh Arif Bulbon :Last week shooting of Mizanur Rahman Mizan directed movie Ragi again started at BFDC in the capital’s Karwanbazar area. In the middle days, its shooting was stopped. This time Achol has been attached with the movie. After Achol’s engagement in Ragi, its shooting got momentum. In the ...

Sports »

Ko, Ji charge to LPGA lead with Henderson one back


New Zealand's Lydia Ko and South Korea's Ji Eun-hee each fired a five-under par 66 to share the lead after Saturday's third round of the LPGA Tournament of Champions.Ko and Ji charged into contention by going low on the front side and parring their way home to stand on 13-under ...

Football »

Salah fires Liverpool seven points clear, Arsenal rock Chelsea


Liverpool moved seven points clear at the top of the Premier League as Mohamed Salah's double inspired a dramatic 4-3 victory over Crystal Palace, while Arsenal ignited their top-four bid by beating Chelsea on Saturday.With second-placed Manchester City travelling to bottom-of-the-table Huddersfield on Sunday, Liverpool seized the chance to tighten ...

City »

Prime Minister Sheikh Hasina being greeted by Home Minister, secretary and IGP during her visit to the Home Ministry yesterday.


International »

Trump offers 3-year protection for immigrants in exchange for border wall


The Washington Post :President Donald Trump on Saturday offered Democrats three years of deportation protections for some immigrants in exchange for $5.7 billion in border wall funding, a proposal immediately rejected by Democrats and derided by conservatives as amnesty.Aiming to end the 29-day partial government shutdown, Trump outlined his plan ...

Cricket »

Rangpur Riders beat Sylhet Sixers


Sports Reporter :Rangpur Riders beat Sylhet Sixers by four wickets in their match of the UCB 6th Bangladesh Premier League (BPL) T20 cricket at Sylhet International Cricket Stadium on Saturday.Chasing Sylhet's fighting total of 194 for the loss of four wickets in 20 overs, Rangpur Riders reached the winning target ...

Sports »

Virat Kohli attends Australian Open, posts picture with Roger Federer


The Indian team completed its most successful campaign Down Under as they won the Test and ODI series comfortably. After close to two months of energy-sapping cricket, skipper Virat Kohli along with wife Anushka Sharma looked in a relaxed mood and attended day six of the Australian Open in Melbourne ...

Entertainment »

Alia , Madhuri Nene on the set of Kalank


Alia Bhatt, Varun Dhawan, Madhuri Dixit Nene, Aditya Roy Kapur, Sanjay Dutt and Sonakshi Sinha star together in Kalank. Dharma Productions' next, Kalank, is being directed by Abhishek Varman. The film's shooting is currently on and Varun Dhawan wrapped up shooting for his part of the film just yesterday. However, ...

International »

Afghan Taliban reject talks with US in Pakistan


Reuters, Peshawar :The Afghan Taliban rejected reports in the Pakistani media that they were prepared to resume meetings with U.S. special envoy Zalmay Khalilzad in Islamabad and repeated their refusal to deal directly with the Afghan government.Pakistani newspapers and television stations reported that a meeting in Islamabad was in prospect ...

Editorial »

Bravery and courage of a Bangladeshi expatriate


FOR bravery and courage, a Bangladeshi expatriate has been honoured as he saved the life of a three-year-old boy in UAE. Bangladeshi expatriate Farouk, who works as a welder in Ajman of UAE, rescued the child thrown from the balcony of a burning apartment by his mother.Bangladeshi community in the ...

 
Items that you save may be read at any time on your computer, iPad, iPhone or Android devices.
 
Are you new to our website? Do you have already an account at our website?
Create An Account Log in here
Email this news to a friend or like someone
Email:
Write a comment to this news