The paper discusses several controversial points from thesis of Nikolai Andreevich Shnyrev «Regime investigations and estimate of gas exchange on the soil-atmosphere interface (methane fluxes from “Muhrino” wetland, West Siberia»). These points concern mainly previous estimates of regional methane emission from West Siberian wetlands, in particular, by Glagolev’s scientific group. The paper shows that “large variability of estimates as well as large disbalance in carbon cycle”, which was claimed in thesis to prove its relevance, contradict to modern investigations of the problem. We also discuss several methodological problems of static chamber method. In particular, it was proved that difference between methane emissions in the light and in the dark is negligible. In addition, we showed that N.A. Shnyrev’s suggestion on improvement the accuracy of static chamber method by reduction of chamber volume is unreasonable. Finally, we discuss if linearity of methane concentration dynamic is necessary for methane flux calculations.