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Indoor air quality has a more significant effect on children than adults because children breathe in more air. Photo: Shutterstock

LettersHong Kong must have indoor air quality standards to protect children

  • Readers discuss the importance of indoor air quality standards for schools in Hong Kong, and good news for the local economy
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The indoor air quality (IAQ) of workplaces and homes has caught the attention of scientists, entrepreneurs and the public in recent years. Studies have found pollutant levels to be greater indoors than outdoors. Good IAQ is very important for health because people spend more than 70 per cent of their time indoors. Poor IAQ can lead to discomfort and illness. Children, the elderly and people with respiratory or heart problems are particularly susceptible.

In 2003, the Environmental Protection Department issued Guidance Notes for the Management of Indoor Air Quality in Offices and Public Places, launched a voluntary IAQ certification scheme for locations with mechanical ventilation and air conditioning systems, and established IAQ Objectives for office buildings and public places. However, in 2011, the Audit Commission noted that the guidance notes included office buildings and some public places, but not schools.

Research on the IAQ of kindergartens and primary schools in Hong Kong is limited. Studies around the world have revealed that IAQ has a more significant effect on children than adults because children breathe in more air. In addition, identifying poor IAQ as the source of the problem is more difficult, as its effect on children may not show until they are older.

Poor IAQ can affect the health and school attendance of children. Maintenance issues in schools, such as those involving mould, moisture and excessive use of cleaning chemicals, have been shown to trigger asthma and allergies.

In reality, indoor air can be 10 times as polluted as outdoor air. Failure to establish the indoor air pollution status can increase the risk of long- and short-term health problems. Therefore, guidelines should be provided to schools in Hong Kong on implementing IAQ improvement measures. In the long term, measures should be taken to improve Hong Kong’s existing IAQ policies and standards for schools and other learning environments.

Prof Keith Ho, Board of Governors, Friends of the Earth (HK)

An economic rebound is around the corner for Hong Kong

Your correspondent in “Has Hong Kong finally put the worst behind it? Not quite” ( November 12) has reservations about Chief Executive John Lee Ka-chiu’s resolve to restore Hong Kong’s image. We may need an unrelenting stock market rally to quiet the pessimists.
What goes down must come up. A possible end to the Ukraine war, German and French U-turns on China, and relaxation of pandemic controls are all good for the economy. We don’t need a crystal ball to know an economic rebound in mainland China and Hong Kong is around the corner. Mr Lee’s statement should be taken as an investment tip to buy at a historic low.

Edmond Pang, Fanling