All 80 barangays in Cebu City are called on to come up with mitigating measures for sinkholes and subterranean caverns. This after the Mines and Geosciences Bureau of the Department of Environment and Natural Resources in Central Visayas found out at least 770 sinkholes in the urban barangays. The data based on MGB’s subsidence hazard continue reading : 80 barangays told to act on sinkholes