Ecological Systems and Devices Annotation << Back METHOD OF ENGINEERING PROTECTION OF URBAN AIR ENVIRONMENT IN NATURAL-TECHNICAL SYSTEMS OF MOUNTAIN-HOLLOWS TYPE (ON THE EXAMPLE OF CHITA) A.P. Shcherbatyuk The method of engineering protection of the air environment in urbanized geosystems of the mountain-hollows type. A variant of rational choice and scientific justification of places and schemes for placing geotechnical structures-in the greatest depressions of intermountain basins and accumulation of SV (pollutants) in the atmospheric air, allowing to reduce their number by 20…30 % in the summer. A method has been developed that allows increasing the use of gas fuel in conditions of sharply continental climate (low temperatures), for internal combustion engines (internal combustion engines) of cars due to a new technical device, which makes it possible to significantly (25…30 %) reduce the amount of SV in the atmosphere of cities located in intermountain hollows in winter. Keywords: method; engineering protection; environmental safety; air environment; natural and technical system; mountain-hollow type. DOI: 10.25791/esip.08.2020.1175 Pp. 56-62.