In the article, based on the generalization of the experience of adjusting efforts in steel combined structures, it is shown, that the most rational method of regulation is calculated in the design process. This method does not require any additional material costs. It is shown that the beam on elastic intermediate supports and solid extremes is a generalized type of all possible types of beams. It was emphasized that the problem of calculating building structures, including combined, first of all should be regarded as a problem of their rational design. The results of experimental studies of combined steel truss with calculated regulation in their internal efforts are presented. Experimental studies confirmed the hypothesis about the possibility of regulating the stress deformation state (SDS) in combined structures with resilient support - system of springs and achieving an equally stressed state in the calculated cross-sections. The sufficient consistency of the experiment results with theoretical calculations is shown and the efficiency of such systems compared with the typical reaches up to 27%. The proposed nomenclature series of effective new light, with a small number of elements trussed structures. Effective combined steel structures with rational geometric parameters and calculated value adjustments of SDS were used during the construction and reconstruction of many buildings:

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Today in Ukraine, the municipal waste management system is focused on landfill waste, mainly their disposal in landfills and unauthorized dumps, most of which do not meet the requirements of environmental safety. Accordingly, the main task at the state and regional levels is to implement a systematic approach to waste management, which will ensure both a gradual reduction in waste generation and an increase in their processing and reuse. Implementation of this task requires the implementation of a set of measures provided by the National Waste Management Strategy in Ukraine until 2030 (approved by the Cabinet of Ministers of Ukraine dated November 8, 2017, No. 820 (Order of the Cabinet of Ministers of Ukraine 2017, No. 820-r) and the National Waste Management Plan until 2030 (approved by the Cabinet of Ministers of Ukraine on February 20, 2019, No. 117-p (Order of the Cabinet of Ministers of Ukraine 2019, No. 117- r). According to documents, a crucial step for each region of Ukraine is developing a regional waste management plan based on a phase of strategic planning of all processes of waste management. The importance of this stage increases as a result of the completed process of power decentralization in Ukraine, and, accordingly, delegating authority to address most community development issues to the local powers.

Assessment of air pollution level of Poltava is performed by using statistical data of enterprises inventory, stationary sites and results of calculations by program EOL-2000. Assessment and correlation the results by new researches (bioindication, air pollution indexes) according to the standards of Ukraine and the world ones are performed. The possibility of performance the further project for an impact of technology-related air pollution on the environment and human health is proved. Implementation of GIS for monitoring the air pollution of Poltava is proposed. This system can be used as a model of such GIS for other similar cities. The process of occurrence of the heat-island affect over cities and its influence on the atmospheric component is described. The importance and efficiency of the comprehensive study of atmospheric air pollution in cities are proved.

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