Related to affected population by building a biomass plant, areas corresponding to the “No affected population” were the most valued and which also include: low, medium and high residential density centres, which in turn are separated by more than 1 km of distance from the facility. Finally, visual Impact produced by the facility is the last factor. The class of the “Not visible” corresponds higher values and is obtained from a Digital Elevation Model and the elements exposed to visual impacts are lakes, forests, villages, etc.