The article discusses the possibility of using hydrogen as an ideal alternative fuel with a zero carbon footprint. It can be considered as such only if it is obtained from the decomposition of water using energy from renewable sources, since hydrogen will no longer belong to traditional types of fuel, turning into an energy accumulator obtained from a certain source, with all the advantages and disadvantages of such devices. The economic efficiency of the battery is estimated by the efficiency. For the industrial use of hydrogen as a fuel, it is necessary to solve such technical problems as the choice of primary energy sources for the decomposition of water, storage and transportation of the resulting gases, as well as to determine the energy feasibility of introducing certain technological schemes. To assess the carbon footprint, it is necessary to determine the primary energy efficiency, that is, to identify the sources of used energy in all links of the technological scheme from the development of project documentation to the disposal of used equipment.