The MBT treatment of waste not only affects its com- position, but also the composition of exhaust gases forming in the incinerator. In order to estimate and compare the effect of MBT to the environmental indicators, the total produced exhaust gas volume as well as amounts of SO2 and HCl generated from 1 ton of incinerated waste were calculated [15]. The volume of exhaust gas was calculated according to the emitted amounts of CO2, H2O, and N2 (these depend on the elemental composition of the waste), as well as the concentrations of O2, N2, and H2O present in the combustion air [16].