Recreational areas and cemeteries account for a relatively small proportion (6.4%) of settlement and urban areas. Yet the actual proportion of green space within settlement and urban areas is considerably greater because the outdoor areas of buildings as well as green strips along streets are counted as building area and transportation area respectively. The degree of land sealing on settlement and urban areas (i.e. the proportion of impermeable ground, corresponding to buildings, asphalt or concrete surfaces) altogether amounted to slightly more than 60% (Graph 10). Thus, just under 40% of settlement and urban areas is accounted for by green areas such as flowerbeds, lawns, woods and private tree stocks. These areas are diverse and, in some cases, have a high degree of biodiversity.