In order to prepare for the negotiations on the EU Energy and Climate Package, the Federal Planning Bureau was asked by the Belgian federal and regional authorities to conduct a study on the impact of the January 2008 European Commission’s proposal. In the course of this study, various scenarios were run. Next to a baseline, two main alternative scenarios were scrutinised: the 20/20 and 30/20 target scenarios, standing for an EU reduction of respectively 20% and 30% of GHG emissions in the year 2020 compared to the level of 1990 and a 20% mandatory EU share of RES in Gross Final Energy Demand in 2020. The report then includes an analysis of the impact of both scenarios on the Belgian energy system and economy as well as on GHG emissions.