Аннотация:The decrease of a content of greenhouse gases now is one of important problems of ecology. The solution of this task may be obtained by the use of two approaches. The first approach is a decrease in emission of greenhouse gases. Two essentially different ways decrease the emission of greenhouse gases. The first way consists in modernization of the known technologies by addition of nanoparticles in a product fabrication. The other way represents the gradual failure of the old technologies leading to generation of CO2. For example, a research of alternative energy sources is perspective trend. The nanostructured materials play an important role in electrochemical devices because they have high specific surface area and fast redox reactions; electrochemical behavior is, therefore, enhanced by the material’s nanostructure. The special attention is deserved by development of fuel cells with nanodimensional particles of the catalysts applied on carbon nanotubes (CNTs). The ionic liquids (IL) are perspective electrolytes for electrochemical devices. The second approach consists in reduction of content of greenhouse gases due to their sorption. Using carbon dioxide (CO2) as a feedstock for commodity synthesis is an attractive means of reducing greenhouse gas emissions and a possible stepping-stone towards renewable synthetic fuels. The ionic liquids are of interest as far as they well dissolve hotbed gases, especially CO2. The nanoelectrochemistry allows to receiving valuable products of electroconversion absorbed CO2 to CO and hydrocarbons.