The proposed modelling of the relationship between the spatial and component structure of the construction industry development and the environment helped to obtain combinations of high and medium levels of the impact of integral indicators of labour, productive and foreign economic components of the construction sector on the environmental index of the region. The high level of adaptability of the models used for the period 2013– –2018 confirms the relationship between the development of the construction sector in most regions of Ukraine and the lowest level of the ecological index. This proves the scientific hypothesis about the negative impact of construction on the country’s ecosystem. The study indicates that the dynamic characteristics of the relationship between the building system and the environment should take into account the existence of direct and indirect or even “hidden” relationships between the components. The scientific value of the study consists in using models of fuzzy sets to assess the relationship between the construction system and the ecosystem based on defuzzification, which preserves the flexibility of the process of assessing the development of subsystems in construction and making decisions as to reducing the negative environmental impact in regions.

The article is devoted to the disclosure of the results of the study of threats to the environment, sustainable development and consumption safety that arise in the process of consumption. The problems of formation of the environment which promotes growth of ecological demand in Ukraine in comparison with other states are analyzed. Factors of internal, external and situational influence on consumer choice at each stage of consumption (awareness of needs, search for information, evaluation of alternatives, purchasing, use and utilization) are investigated. The main of them such as values, culture of consumption, marketing (promotion), level of development of institutional base (legislation, social norms) are established and their optimal level in conditions of uncertainty is proved. Conclusions are made on the basis of using methods of office research, sociological survey, modeling on the basis of fuzzy logic with the use of expert assessments. The leading role of the factor of internal influence, which covers human values that can be improved by raising the educational and cultural level of the population, which is undoubtedly related to income is proved.