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December 20th, 2013:

Bloomberg: Hong Kong’s Pollution Near 6-Month High (Nov 2013)

from David Ingles, reporting for Bloomberg on the high levels of air pollutants in Hong Kong’s air last month.

Jason Lerwill, an air specialist at Renaud Lifestyle Products (retailers for air purifier systems), mentions three major contributors to air pollutants in the city: shipping in the Pearl River Delta, roadside pollution, and factory emissions across the border. Christine Loh, undersecretary for the environment, speaks enthusiastically about policies to reduce vehicle emissions, but mentions nothing about shipping and factory emissions.

4 Nov 2013

Science Daily: Air Pollution Puts the Health of School Children at Risk

from Science Daily:

A recently completed study by The Hong Kong Polytechnic University (PolyU) on 310 children in 12 schools across the territory found the air pollution level along the traveling routes from home to schools and particulate levels outside school both at a very high level, and most of the school children have lung function weaker than the predicted levels.

The study was done by Dr Hung Wing-tat, Professor Frank Lee Shun-cheng and Ms Lee Sin-hang of the University’s Department of Civil and Environmental Engineering. They found that children in only two out of twelve surveyed schools have lung function better than predicted levels, whilst children in the remaining ten schools have lung function weaker than the predicted levels.

The study also found that carbon dioxide levels inside five of the twelve school classrooms are found to be higher than the stipulated good class level of HK Indoor Air Quality (HKIAQ), probably due to the presence of full class of students within the monitoring period.

PolyU researchers also collected information about the traveling patterns of these 310 school children and then monitored the air pollution level along the traveling routes of the subjects. About 48% of school children go to school on foot, the second most popular choice is the school bus (24%). They found that both PM10 and PM2.5 levels in various transportation modes are high.

It is worth noting that PM2.5 levels far exceed the stipulated health levels of WHO safety level of 75 µg/m3 (24 hours average) and the situation in school buses is worst. The total volatile organic compound (TVOC) levels in all transportation modes far exceed the good class level of HKIAQ and the situation in school buses is worst.

The study also found that allergic rhinitis is very common among local school children (ranging from 13% to 59.3% in schools). Allergic rhinitis is found to be related to tobacco smoking household, incense burning at home and molds at home. However, molds and mildews are common (25.9% to 62.5%) in household because of the humid weather.

Children in tobacco smoking households also have significantly poorer lung function. The study found high percentages of smokers in the households, ranging from 25.0% to 69.6%. One of the key findings is that Lung function of school children, FVC and FEV1 are found to be negatively co-related with PM10 levels in classrooms at 0.05 significant levels. It is critical to suppress the level of PM10 in classroom to protect the health of school children.

Pulmonary function tests were conducted on surveyed school pupils to assess their lung function, which was measured by a spirometer in this study.

The above story is based on materials provided by The Hong Kong Polytechnic University.

19 Nov 2013

SCMP: Idling engine ban has failed to clear the air

from Ernest Kao of the SCMP:

A law banning idling engines has come under fire for having only a minimal impact on improving air quality, nearly two years after it was introduced.

Lawmakers said the Motor Vehicle Idling Ordinance had not stopped idling engines, which caused pollution and were a nuisance to pedestrians.

Environment chief Wong Kam-sing defended the ban, which came into effect in December 2011, saying it had reduced the number of complaints about roadside discomfort caused by hot exhaust fumes and noise pollution.

Environment bureau statistics show that in the past two years, 3,070 idling vehicles were timed but only 86 fines were issued. Most were handed out to drivers of non-franchised buses and private vehicles.

The number of idling engine complaints had dropped 40 per cent, from 1,802 last year to about 1,000 this year. (SCMP)

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