Headline: Repurposed Oyster Farm Bags Offer New Real Estate for Migratory Birds

Standing atop a 16-foot-high seawall on South Korea’s western coast, Chris Purnell and his colleagues slide mesh bags stuffed with empty oyster shells down onto the sandy mudflats of the Geum Estuary. They then clip the heavy bags to ropes and drag them into the gently lapping waters that run into the Yellow Sea.