Looking for and finishing up the new methods leading to reduction of emission of CO2 is the essential task in frames of obligations of UE Directives in range of protection of environment. The energy production in Poland mainly depends on burning the mineral fuels. The decrease the waste of electric energy or decrease energy consumption of some processes, especially in animal production, by using systems of salvage energy or lowering waste of energy, can lead to reduction of emission of CO2 . The aim of the study is to demonstrate the impact of pre-cooling systems of milked milk and recovered heat to reduce electricity consumption during the main cooling milk container. Analysis of the results of examination the existing installations and systems of preliminary cooling of milk showed already the decrease the energetistic expenditures about 50% during cooling process as well as the emission CO2 about 0,02 % in scale of whole emission of dioxide carbon in Poland per year.