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Hong Kong’s Air Pollution And You Kids

ExpertsPost Category - ExpertsExperts

Poor air quality is Hong Kong’s number one public health problem, the most harmful source being roadside pollution, pollutants emitted by vehicles on our roads. In 2010, Hong Kong saw its worst roadside pollution levels to date.  Here, our friends at the Clean Air Network outline some of the scary facts about the air we breathe and how you CAN make a difference.

Though air pollution affects us all, some suffer more than others – our children being particularly vulnerable. In the case of children, their susceptibility stems from their breathing rates being higher than that of adults, resulting in a much higher absorption rate of pollutants. Their airways are also smaller and their immune systems less developed. Even more alarmingly, the health impacts of air pollution can affect them even before they are born.

– Pregnant women who are exposed to high levels of air pollutants, or who live within 400 meters of busy roads, have an increased risk of giving birth prematurely and having babies with low birth weights. (Environmental Health Journal, 2011 and UCLA Institute of the Environment and Sustainability, 2008).

Air pollution can have long-lasting effects on the mental development of an unborn child. Young children whose mothers were exposed to roadside pollution during pregnancy were shown to have lower IQs (by approximately 4 points) and more symptoms related to attention problems, anxiety and depression (American Academy of Pediatrics, 2009 and Environmental Health Perspectives, 2011).

– Children born to mothers who live close to freeways have been found to have twice the risk of developing autism (Environmental Health Perspectives, 2010).

– Young children exposed to nickel, vanadium and black carbon, which originate from vehicle exhaust, often wheeze or cough (American Journal of Respiratory and Critical Care Medicine, 2001).

– Long term exposure to traffic air pollutants is also linked to an increased risk of illnesses, such as ear/nose/throat infection and the flu, in children. (American Journal of Respiratory and Critical Care Medicine, 2002).

As children are still growing, their lungs are still developing, therefore, breathing in air pollutants can permanently impair their lung function and respiratory capacity. This can easily lead to a lifetime of weakened health (New England Journal of Medicine, 2004).

– Air pollution has been shown to adversely affect levels of maximum oxygen uptake in children, and therefore, physical exercise in highly polluted areas might not have any beneficial effect on cardiopulmonary fitness (Chinese University of Hong Kong, 2004).

– Living close to highways and major roads (e.g. within 100 to 150 meters) has been shown to exacerbate, or even cause the development of, asthma in children. Children aged four and under are the most at risk for asthma attacks from traffic-related air pollution. (Environmental Health Perspectives, 2006 and Medical Journal of Australia, 2010).

Air pollution is shown to cause brain inflammation and nerve cell damage leading to a lower IQ, as well as memory and motion impairment in both kids and adults (Toxicologic Pathology, 2008 and Environmental Health Perspectives, 2011).

Babies and toddlers who live in areas with moderate air pollution may have a higher risk of middle-ear infection than those breathing cleaner air (American Journal of Epidemiology, 2009).

Children who live within 100 meters of a busy roadway have a greater risk of developing leukaemia and a 65% increased risk of contracting pneumonia (Environmental Health Perspectives, 2011 and The Proceedings of the American Thoracic Society, 2009).

– The Bottom Line? The negative impacts of air pollution on children are varied and serious, and if exposed from an early age, a child will suffer impaired health for life.

What can parents do to tackle the problem?

• The most effective method is to avoid exposure in main intersections with heavy air pollution. Levels of air pollution are much lower even just one street away. Paper or surgical face masks offer little to no protection at all.

• You can also stay abreast of air pollution conditions by signing up to receive air pollution email alerts from Clean Air Network at This email alert service delivers an email to you whenever the air quality becomes unhealthy and the official Air Pollution Index exceeds 100 at any of your designated locations.

When air pollution is very high, you should limit your child’s exposure by reducing their outdoor exercise. However, there also has to be a balance – a recent study showed that Vitamin D, which is primarily absorbed from the sun, plays a role in protection against childhood asthma.

A healthy diet with lots of antioxidants and a low amount of stress in the home environment also help to reduce the toxic effects air pollutants have on your child’s body.

• If you and your children are required to stay in highly polluted areas for prolonged periods of time, drink more water to keep your respiratory airways moist and wet.

Don’t miss this hard hitting video of Professor Anthony Hedley, one of the world’s leading experts on child health and environmental toxicity, to learn more about the short and long term impacts of air pollution on children’s health.

If you are aware of Hong Kong’s air pollution and want to do something about it, please support Clean Air Network. We are the leading clean air NGO in Hong Kong. You can visit our website for unrivaled resources about air pollution, health, policy and news, or sign up for our newsletter by sending us an email at [email protected]. You can also invite us to speak at your school or corporation.

Finally, you CAN make a difference: donate to CAN today!

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