Connect with us

Air Pollution

Air purifiers to be added to the top of Bangkok buses. Really…

The Thaiger

Published 

 on 

Air purifiers to be added to the top of Bangkok buses. Really… | The Thaiger
PHOTO: The air-pollution-busters being installed on Bangkok bus tops - The Nation
  • follow us in feedly

“It is like a single dead pixel on your phone, hardly noticeable”

Air purifiers sitting on tops of buses. Apparently this is another solution for Bangkok’s air pollution problems. Sounds like the people selling the mobile bus-top air purifiers have a very convincing sales person!

But Bangkok’s Mass Transit Authority director Surachai Eamvachirasakul says the department will go ahead with plans to install the air purifiers on top of Bangkok’s public buses. The promise is that it will reduce dust pollution. The air-filtration systems which will be installed on top of some of the state-operated buses are said to be capable of sucking in polluted air and blowing out clear air behind it. The director cited several test runs of the system as “evidence”.

“The device is capable of filtering 10,000 cubic metres of air per one trip. Scientific research indicated that an adult would breathe in an average 0.5 cubic metres per hour, so a bus would be able to provide clear air to more than 20,000 people on the road.”

This fuzzy maths shows an appalling ignorance of the larger pollution problem, most of which comes from plantation fires to the north of the capital – little to do with any local city contributions.

Even Chulalongkorn University biologist Jessada Denduangboripant says the plan “will have a near-zero impact on the PM2.5 dust particles”. Near zero. That’s a much closer estimate of the effectiveness of strapping air purifiers to the tops of the buses. Better still, don’t run the polluting old diesel buses in the first place which may cause more pollution per kilometre than the air purifiers could ever ‘filter’.

“If it is working as claimed, I believe it will only be capable of cleansing just a pixel of Bangkok,” Jessada said to Khaosod English.

Another scientist opined that the effectiveness of the air purifiers “would be trivial at best”, given the amount of air in the capital city against what the machines could process.

Matipon Tangmatitham, a researcher at the National Astronomical Research Institute of Thailand got out his calculator.

“Based on the area of Bangkok and the height of dust particles from the ground, it gives out 1.568E+12 cubic metres of air that needed to be filtered. But the scheme would only produce 20,000 cubic meters of clean air, even when all the 500 buses are on the road.”

(And how much pollution is caused by the 500 buses cruising around the city?)

But BMTA director Surachai hit back at the scientists with a test result he gathered, which compares PM2.5 level before entering the device at 48-52 AQI with 1-5 AQI after passing through the device.

In truth, the effectiveness of the system would be almost impossible to calculate on a city-wide situation. A few extra kilometres of wind strength from the north on a day of burn-offs in the north would blow the pollution readings off the scale, completely obliterating any tiny improvements made in the immediate vicinity of the passing bus.

SOURCE: Khaosod English

Air purifiers to be added to the top of Bangkok buses. Really... | News by The ThaigerAir purifiers to be added to the top of Bangkok buses. Really... | News by The Thaiger

Keep in contact with The Thaiger by following our Facebook page.

Chiang Mai

Chiang Mai firefighters chased up a tree by wild elephants

Greeley Pulitzer

Published

on

Chiang Mai firefighters chased up a tree by wild elephants | The Thaiger
PHOTO: Chiang Rai Times

Firefighters in Thailand’s North were chased up a tree by a herd of elephants yesterday. The group were on patrol searching for fires in Chiang Mai province’s Omkoi district.

The men told reporters they were patrolling for fires when they ran across a small herd of wild elephants. Fearing for their safety, the fled up a nearby tree and stayed there until the elephants went their way.

Located in the south of Chiang Mai Province, Omkoi is the home of the Omkoi Wildlife Sanctuary, which has a number of rare and endangered species including wild Asian elephants. But stumbling across wild elephants in the park is uncommon as it has a small population.

The firefighters were in the area as part of efforts to fight and spot forest fires burning across the province. Many villagers start fires to improve annual mushroom harvests and prepare land for planting new crops.

In another story, two men have been arrested in relation to fires that have caused widespread damage in Chiang Mai’s Doi Suthep-Pui National Park. The two are alleged to have started a fire in a forest area in Ban Thung Pong Tai, in Hang Dong District.

The men admitted to starting the fire but claimed “that they were only trying to create a fire protection line”, fighting fire with fire and providing protection from other fires in the park, but their fire got out of control. They face criminal charges.

In Chiang Mai’s Mae Chaem district, a major source of corn crops, the district chief ordered an investigation after reports of a fire in the Pa Baan Tuan area. Officials arrived to find a man standing in the area with a lighter in his hand (doh!).

The man was taken into custody, and told authorities he was taking a shortcut home when he saw a pile of leaves and branches. He says he decided to get rid of them by lighting a fire which got out of hand.

The was taken into custody where he will have time to reflect on much better excuses in the future.

SOURCE: Chiang Rai Times

Keep in contact with The Thaiger by following our Facebook page.
Continue Reading

Coronavirus (Covid-19)

Lockdowns, closures mean cleaner air in European cities

Greeley Pulitzer

Published

on

Lockdowns, closures mean cleaner air in European cities | The Thaiger
PHOTO: DevelopmentAid

Lockdowns, travel restrictions and factory closures due to the Covid-19 coronavirus pandemic are having some unexpected positive consequences. Satellite images show that cities around Europe, including Brussels, Paris, Madrid, Milan and Frankfurt, are showing a huge reduction in air pollution average levels of noxious nitrogen dioxide over compared with the same period last year.

New images, including heat maps, released by the European Space Agency and analysed by the nonprofit European Public Health Alliance, show the changing density of nitrogen dioxide, which can cause respiratory problems and cancer. (Weather events can influence air pollution, so the satellite pictures took a 20 day average and excluded readings where cloud cover reduced the quality of the data.)

In Madrid, average nitrogen dioxide levels decreased by 56% week-on-week after the Spanish government banned nonessential travel on March 14.

In abandoned Venice, dolphins were supposedly spotted in spotted in the city’s legendary canals, though this turned out to be “fake news.” The canal water, nonetheless, is clearer because of the huge decrease in boat traffic.

The EPHA says people living in polluted cities may be more at risk from the virus because prolonged exposure to bad air can weaken the immune system, making it harder to fight infection.

“That connection is very likely, but because the disease is new, it still has to be demonstrated.”

China also recorded a drop in air pollution in its major cities during February, when the government imposed draconian lockdown measures to contain the epidemic.

But in some regions of Poland, pollution levels remained high during the period despite its lockdown, possibly due to the prevalence of coal based heating. EEA data show that air pollution causes around 400,000 premature deaths each year in Europe.

SOURCES: Thai PBS World |Reuters

Keep in contact with The Thaiger by following our Facebook page.
Continue Reading

Air Pollution

Chiang Mai chokes as fires rage in the north of Thailand

Greeley Pulitzer

Published

on

Chiang Mai chokes as fires rage in the north of Thailand | The Thaiger
PHOTO: Thailand Today

Northern Thailand is choking under a toxic shroud and it’s not getting any better. Air pollution across the upper North remains “at critical levels,” in many areas, including some of the main population centres. Authorities are monitoring almost 400 active hotspots in Chiang Mai alone yesterday.

The air quality didn’t improve this morning, with IQAir recording “very unhealthy” air quality and hazardous PM2.5 dust levels at around 200 in parts of Chiang Mai and up to 270 around Chiang Rai today (below).

Thailand’s official safe level is 50: the World Health Organisation sets it at 25. Though it’s improved somewhat during the day, Chiang Mai once again rated world’s worst for air quality.

According a 2019 report, PM2.5 caused 23,800 premature deaths in Thailand in 2017.

Government spokeswoman Narumon Pinyosinwat says fires have definitely affected air quality, with 17 provinces in the North reporting an increase in levels of PM2.5 pollutants yesterday. Only two, Nakhon Sawan and Uthai Thani in the north-east reported PM2.5 readings below the Pollution Control Department’s “safe” threshold.

Chiang Dao district in Chiang Mai reported the highest PM2.5 reading in the North yesterday at 360.

Narumon says the worsening pollution is due to a combination of factors which include arson, drought and wind patterns which trap pollutants right over Thailand. Others say agribusiness, with its annual plantation field burnings, continues to exacerbate the problem.

Chiang Mai chokes as fires rage in the north of Thailand | News by The Thaiger

According to satellite data, on Saturday there were 3,809 hotspots in Thailand, 5,061 in Laos and 10,061 in Myanmar. As of yesterday, 398 hotspots, nearly 10% of the country’s total, were found in Chiang Mai.

Most of the blazes were related to a continuing bushfire in Doi Suthep-Pui National Park, which suddenly raged out of control late on Saturday after burning for about a week.

SOURCE: Bangkok Post

Keep in contact with The Thaiger by following our Facebook page.
Continue Reading
ผู้ติดเชื้อ COVID 19 จะแสดงอาการอย่างไรในแต่ละวัน | The Thaiger
สื่อไทย2 weeks ago

ผู้ติดเชื้อ COVID 19 จะแสดงอาการอย่างไรในแต่ละวัน

Covid-19 กำลังทดสอบประเทศของเราและสังคมของเรา ชีวิตสุขภาพและงานถูกคุกคาม | The Thaiger
สื่อไทย2 weeks ago

Covid-19 กำลังทดสอบประเทศของเราและสังคมของเรา ชีวิตสุขภาพและงานถูกคุกคาม

ส้มตำปลาร้า อีสานอินดี้ | The Thaiger
สื่อไทย4 weeks ago

ส้มตำปลาร้า อีสานอินดี้

Thailand News Today – March 6, 2020 | The Thaiger
Thailand1 month ago

Thailand News Today – March 6, 2020

คนถนัดซ้ายและขวา ต่างกันยังไง | The Thaiger
สื่อไทย1 month ago

คนถนัดซ้ายและขวา ต่างกันยังไง

เกมหนอน slither io เล่นกับเพื่อน | The Thaiger
สื่อไทย1 month ago

เกมหนอน slither io เล่นกับเพื่อน

รีวิวมาม่าที่แพงที่สุดใน 7-11 | The Thaiger
สื่อไทย1 month ago

รีวิวมาม่าที่แพงที่สุดใน 7-11

Thailand News Today, February 28, 2020. Daily TV news update. | The Thaiger
Thailand1 month ago

Thailand News Today, February 28, 2020. Daily TV news update.

หัดตีกอล์ฟครั้งแรกในชีวิต คิดว่าตีโดนมั้ย | The Thaiger
สื่อไทย1 month ago

หัดตีกอล์ฟครั้งแรกในชีวิต คิดว่าตีโดนมั้ย

สื่อนอกตีข่าว ช่อ อภิปรายรัฐบาลพลเอกประยุทธ์ เอี่ยวคดี #1MDB | The Thaiger
ข่าวการเมือง1 month ago

สื่อนอกตีข่าว ช่อ อภิปรายรัฐบาลพลเอกประยุทธ์ เอี่ยวคดี #1MDB

เกมแรกก็เอาเลย ! คลิป: มุ้ย ธีรศิลป์ ซัดให้ ชิมิสุ เอส-พัลส์ ออกนำ เอฟซี โตเกียว 1-0 | The Thaiger
เจลีก2 months ago

เกมแรกก็เอาเลย ! คลิป: มุ้ย ธีรศิลป์ ซัดให้ ชิมิสุ เอส-พัลส์ ออกนำ เอฟซี โตเกียว 1-0

Samsung S10 lite สเปคแรง เล่นเกมส์ดี จริงมั้ย?? | The Thaiger
สื่อไทย2 months ago

Samsung S10 lite สเปคแรง เล่นเกมส์ดี จริงมั้ย??

แปลภาษา ด้วยฟีเจอร์กล้องใน Google Translate | The Thaiger
สื่อไทย2 months ago

แปลภาษา ด้วยฟีเจอร์กล้องใน Google Translate

7 สัญญาณ บ่งบอกว่า เขาชอบคุณ | The Thaiger
คลิป2 months ago

7 สัญญาณ บ่งบอกว่า เขาชอบคุณ

10 อันดับ พิธีกรรมสุดแปลกจากทั่วโลก | The Thaiger
สื่อไทย2 months ago

10 อันดับ พิธีกรรมสุดแปลกจากทั่วโลก

Trending