Pedestrians cover their noses to guard against the poor air quality in the busy streets in Causeway Bay. Photo: SCMP
Pedestrians cover their noses to guard against the poor air quality in the busy streets in Causeway Bay. Photo: SCMP

Delta air quality improves, but roadside pollution worse in Hong Kong

Clean-ups at power plants and tighter controls on vehicle emissions cited as key factors

Pedestrians cover their noses to guard against the poor air quality in the busy streets in Causeway Bay. Photo: SCMP
Pedestrians cover their noses to guard against the poor air quality in the busy streets in Causeway Bay. Photo: SCMP
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