TY JOUR TI THE PROBLEM OF ENERGY CONSERVATION IN RUSSIA KW energy efficiency KW energy saving KW fuel and energy complex KW efficient use of energy resources KW building envelope KW insulation materials KW polystyrene foam KW mineral wool products. JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Denisova, Y.V. AU Tarasenko, V.N. PY 2016 IS 1 PB Belgorod State Technological University named after V.G. Shukhov