Tracking Hong Kong’s litter trail all the way to Taiwan

Up to 40 per cent of litter dropped on Hong Kong’s streets may end up polluting the city’s waters or being washed ashore as far away as Taiwan, a study involving floating balls with GPS trackers dropped in drains has suggested. Global conservation group WWF used 100 of the GPS devices to track the trash in the city’s storm drains and rivers. And its researchers called on the public and the government to curb street-level littering and manage drains better to cut it off at...