University of Hong Kong postgraduate researcher Liu Yi examines a testing point for groundwater in Ting Kok, Tai Po. Photo: SCMP Pictures

Stem the red tide: researchers say human pollution is behind algal blooms and government should take charge

A wave of harmful red tides killed off 220 tonnes of fish across mariculture zones, mostly in the Tolo Harbour area this year

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University of Hong Kong postgraduate researcher Liu Yi examines a testing point for groundwater in Ting Kok, Tai Po. Photo: SCMP Pictures
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