Fluxes of N2O, NO, NO2, CO2 and CH4 were measured on compost samples from two different sites in Austria mixed with five different stone dusts. Before the measurements, 35 different stone dust samples were analysed. The bulk mineral content was determined by X-Ray diffraction. Chemical analyses included pH-value, carbonate content and electric conductivity. Grain size tests were made by a combination of wet sieving and sedimentation analysis. In a two factorial experimental design, the sieved compost samples were kept under different conditions with respect to temperature (5 C, 12 C, 19 C and 26 C) and moisture (40% and 60% water filled pore space). Our aim was to test whether the application of different stone dusts could reduce trace gas emissions. In addition we assessed the influence of temperature and moisture on the gas fluxes. Four replicate compost samples from each sampling were incubated at four different temperatures for nine hours of continuous NOx and CO2 measuring, followed by N2O and CH4 determination. The different composts showed differences in their greenhouse gas emissions at the same moisture and temperature conditions. Sonnenerde compost emitted most N2O and MA48 compost most CO2. Stonedust was reducing greenhouse gas emissions with a significant reduction in the case of CO2.