Thick smog hangs over Hong Kong in January last year. Photo: AFP Thick smog hangs over Hong Kong in January last year. Photo: AFP
Thick smog hangs over Hong Kong in January last year. Photo: AFP
Hong Kong

Harmful ozone levels in Hong Kong up 35pc in last 15 years

Some key pollutants fell, but government and environmentalists at odds over why

Ernest Kao
Ernest Kao

Updated: 1:11pm, 25 Feb, 2015

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Thick smog hangs over Hong Kong in January last year. Photo: AFP Thick smog hangs over Hong Kong in January last year. Photo: AFP
Thick smog hangs over Hong Kong in January last year. Photo: AFP
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