Easterly wind spares Hong Kong from Pearl River Delta smog
City’s air to remain relatively clean despite heavy pollution in nearby Foshan, Shenzhen and Guangzhou
The severe smog enveloping the Pearl River Delta will not affect Hong Kong for now thanks to the favourable wind direction, a representative from an environmental group said.
Despite high concentrations of harmful pollutants recently recorded in nearby Foshan, Shenzhen and Guangzhou, which saw the air quality index hit the hazardous 300 benchmark in some areas, Hong Kong has been able to enjoy a breath of fresh air because the easterly wind currently blowing through the city does not pass through the smoggy areas.
But a government official said regional efforts were needed to maintain healthy air quality in the city as New Territories West was vulnerable to pollutants produced in the adjacent mainland industrial zone.
“We don’t exclude the possibility that the smog might be blown into Hong Kong under favourable conditions,” Clean Air Network campaign officer Winnie Tse Wing-lam said during a radio programme on Friday. “But will Hong Kong turn into a smoggy city like Foshan? I don’t think so.”
Tse said the city will continue to be controlled by the easterly wind in the next couple of weeks, while the severe smog mainly affects cities located to the northwest of Hong Kong.
This means the air brought to the city will be relatively fresh.
Speaking on the same radio programme, Mok Wai-chuen, assistant director of air policy at the government’s environmental protection department, said cooperation with mainland cities in the Pearl River Delta was necessary to improve the air quality in Hong Kong.
Watch: Beijing continues to choke on think smog
He said the government had been working with the Guangdong provincial government to set emission reduction targets, and both sides will review the results in the first quarter of this year.
Lower concentrations of harmful pollutants were recorded last year, including the tiny particulates that can penetrate deep into the lungs, but roadside-dominant nitrogen dioxide remains a headache for the city, with most figures failing annual air quality targets, according to preliminary air quality data for 2016 released by the department.
However, much of the decline was due to wetter, windier weather in what are traditionally two of the most polluted months, January and October, according to Dr Cheng Luk-ki, head of scientific research and conservation at Green Power.