For the reduction of the anthropogenic greenhouse effect, the CO2, emissions are clearly to be reduced in future, according to the resolution made by the Federal Republic. Against the background of this objective, possible contributions of the biogenous solid fuels for the reduction of the CO2 release of fossil origin are presented and discussed. For that, first the existing potentials of biomass in Germany and their present use are shown. Based on this, the CO2, emissions by the present use already avoided, as well as the existing unexploited potentials of the CO2 reduction potentials still to be exploited are determined. In accordance with an ,,integral＇＇ starting point, thereby all pre- and post-positioned processes are considered. Finally, the specific CO2 reduction costs are analysed and compared with other options.