The animal production is responsible for almost 1/5 world greenhouse gases emissions (without taking into account the vapor of water emission). The aim of this paper was to analyze the literature data in the field of studies on methane emissions from animal husbandry (including manure management), to estimate the total scale of the emission in case of Poland and the size for different kinds of typical farms as well as the approximate cost analysis of this emission in case of "methane" tax implementation. It was found that depending on the price scenario (4.07-30 euro Mg-1 CO2eq) costs of methane emission from animal production are widely different and can reach even over 190 million euro in scale of whole Poland. Comparing the methane emission from pigs production (0.35 million tonnes / year) with the one from cows breeding (6.348 million tones / year) a huge disproportion between those values is clearly visible. Methane emission from pigs production is in fact more than 18 times lower.