Hong Kong has proposed doubling the size of a digital technology hub in its Northern Metropolis megaproject and allowing landmark towers of up to 250 metres (820 feet) tall, sparking concerns among environmentalists about risks to migratory birds. The revised proposal for Lau Fau Shan, to be discussed by the Yuen Long District Council’s town planning and development committee on Thursday, would expand the planned digital technology hub from 15 to 30 hectares (6.07 to 12.14 acres), with a total...