The problems of account of both positive and negative external effects of economic entities are considered. It forms preconditions for increase of ecological-economic efficiency of economic decisions on the planning stage due to adjustment of real targeting in course of emergence of both positive and negative external and internal effects of producing economic agents. Account of external effects enables efficient ecological-economic substantiation of economic decisions concerning regional social, ecological and economic development, which in its turn provides the increased efficiency of functioning of regional ecological-economic systems. 

external effect, internal effect 

The problems of sustainable development are examined – as achievements of positive rates of the economy growing along with diminishing of pollution of environment. Connection between profits per capita and by pollutions of atmosphere is modelled. A form of connection between profits and pollution in accordance with the theory of economy of nature management is back U-similar, that is at first pollution grows together with growth of profits, but then under reaching the certain level of profits pollution must begin to fall. From point of economic science, economy growing, attended with diminishing of pressure on an environment, and will be that stage of passing to principles of sustainable development. Results of modeling are presented and terms which quality of air pool in Ukraine will become better are improved. 

Environmental Kuznets Curve, sustainable development, regional economic development, Pollution–Income Model