While initiatives to control other major pollutants have yielded results, local ozone pollution has surged 20 per cent since 2013, hitting a two-decade high. Illustration by Perry Tse

Ground-level ozone: the invisible, deadly pollutant undermining Hong Kong’s quest for clean air

The city’s air quality is getting better, but a hidden, lesser-known concoction is lurking that has scientists and policymakers scratching their heads

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While initiatives to control other major pollutants have yielded results, local ozone pollution has surged 20 per cent since 2013, hitting a two-decade high. Illustration by Perry Tse
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