OPTIMIZATION OF THE REGIONAL ENERGY SYSTEM WITH HIGH POTENTIAL OF USE OF BIO-WASTE AND BIORESOURCES AS ENERGY SOURCES WITH RESPECT TO ECOLOGICAL AND ECONOMIC PARAMETERS: THE KRASNODAR KRAI CASE Article Ratner S.V., Iosifov V.V., Ratner M.D. Региональная экономика: теория и практика. Vol. 16. 2018. P. 2383-2398