In order to make it easier to compare the three scenarios propose an thus the quality of the technical input provided for the waste management decision-making process, Fig.11 shows the results in terms of recovered resources(materials and energy) and required volume of landfill. Source separation level 35% maximizes energy recovery(126 GWh/y in cogeneration, 439 GWh/y). By contrast, source separation level 65%represent the maximum source separation and collection effort, permitting larger amounts of recovered materials(114 kt/y) but limiting energy recovery(92 GWh/y for power generation, 303 GWh/y in cogeneration). The implementation of a high quality source separation and collection system, together with the availability of up-to-date plants for biological thermal treatments, strongly reduces the need of landfill volumes. Anyway, there is a slightly higher requirement for landfill volume in the source separation level 65% scenario(234 m3/d, i.e. 36.1% more than that for source separation level 35%), due to the necessity of disposing the increased residues from the recycling chain(186% more than in source separation level 35%) an from biological treatment(128% more than in source separation level 35%).