Damaged coral reefs in a Unesco-listed geopark in Hong Kong may take years to recover, environmentalists have warned, after a government investigation found that an area of about four square metres had been affected. Thousands of tourists were found to have flocked to Sharp Island in Sai Kung during mainland China’s National Day “golden week” holiday this month, with some trampling on corals while snorkelling and digging up marine organisms. The Agriculture, Fisheries and Conservation Department...