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October 31st, 2016:

Buses are the main polluters, not private cars

Ariel Kong (“Air filters won’t fix our city’s poor air quality”, October 28) says children need to understand the causes of pollution and “get into the habit of using public transport”. And adds that hopefully when they grow up they will choose not to buy a car and “we will have fewer polluting vehicles on our roads”.

If she would read the Environment Bureau’s March 2013 paper on pollution, “A Clean Air Plan”, she would know that private vehicles account for a tiny fraction of the pollution caused by commercial vehicles and buses, especially the old ones.

On page16, she would see a graphic and the numbers: for particulate pollution, goods vehicles produced 890 tonnes, buses 270 tonnes and private cars just 20 tonnes annually (1.72 per cent of the total for buses plus goods vehicles); for nitrogen oxides, the numbers show goods vehicles produced 36,950 tonnes, buses 9,640 tonnes and private cars just 890 tonnes (1.91 per cent of buses plus goods vehicles).

Overall, buses (about 20,000 of them) produce 11 to 14 times the pollution of the 500,000 private cars in Hong Kong. Buses do carry more people, on average, but commercial vehicles and buses remain the overwhelming source of Hong Kong’s roadside pollution.

That Ariel Kong misses this point shows the success of the transport lobby in obscuring it, and highlights the immorality of their continuing refusal to protect the health of Hongkongers, old and young.

Paul Serfaty, Mid-Levels

300 million children breathe heavily toxic air: UNICEF

Some 300 million children live with outdoor air so polluted it can cause serious physical damage, including harming their developing brains, the United Nations said in a study released Monday.

Nearly one child in seven around the globe breathes outdoor air that is at least six times dirtier than international guidelines, according to the study by the UN Children’s Fund, which called air pollution a leading factor in child mortality.

UNICEF published the study, “Clear the Air for Children,” a week before the annual UN climate-change talks, with the upcoming round to be hosted by Morocco on November 7-18.

The agency, which promotes the rights and well-being of children, is pushing for world leaders to take urgent action to reduce air pollution in their countries.

“Air pollution is a major contributing factor in the deaths of around 600,000 children under five every year, and it threatens the lives and futures of millions more every day,” said Anthony Lake, executive director of UNICEF.

“Pollutants don’t only harm children’s developing lungs. They can actually cross the blood-brain barrier and permanently damage their developing brains and, thus, their futures. No society can afford to ignore air pollution,” Lake said.

Toxic air is a drag on economies and societies, and already costs as much as 0.3 percent of global gross domestic product, the broad measure of economic activity, UNICEF said.

Those costs are expected to increase to about one percent of GDP by 2060, it said, as air pollution in many parts of the world worsens.

UNICEF points to satellite imagery which it says confirms that about two billion children live in areas where outdoor air pollution exceeds minimum air-quality guidelines set by the World Health Organization.

The air is poisoned by vehicle emissions, fossil fuels, dust, burning waste and other airborne pollutants, it said.

South Asia has the largest number of children living in such areas at about 620 million, followed by Africa with 520 million and the East Asia and Pacific region with 450 million.

The study also looked at indoor air pollution, typically caused by burning coal and wood for cooking and heating.

Together, outdoor and indoor air pollution are directly linked to pneumonia and other respiratory diseases that account for almost one death in 10 in children under the age of five, or nearly 600,000 children, making air pollution a leading danger to children’s health, UNICEF said.

The agency noted that children are more susceptible than adults to indoor and outdoor air pollution because their lungs, brains and immune systems are still developing and their respiratory tracts are more permeable.

Children breathe twice as quickly as adults and take in more air relative to their body weight.

The most vulnerable to illnesses caused by air pollution are children living in poverty, who tend to have poorer health and little access to health services.

– Better protect children –

To combat these noxious effects, UNICEF will call on the world’s leaders at the UN’s 22nd meeting on climate change in Marrakesh, known as COP22, to take urgent action to better protect children.

“Reducing air pollution is one of the most important things we can do for children,” UNICEF said in its report.

At the government level, UNICEF said steps should be taken to reduce fossil-fuel emissions and increase investments in sustainable energy and low-carbon development.

The agency, noting that air quality can fluctuate rapidly, also called for better monitoring of air pollution to help people minimize their exposure.

Children’s access to good-quality healthcare needs to be improved and breastfeeding in the child’s first six months should be encouraged to help prevent pneumonia.

Policymakers should “develop and build consensus on children’s environmental health indicators,” the report urged.