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On the basis of the results interpretation of hydrochemical indicators change dynamics and the application of bioindication method by phytoplankton communities the geoecological state of two artificial reservoirs located in the zones of influence of metallurgical works objects and tested rehabilitation by introducing two strains of algae chlorella: the Matyrsky reservoir (Chlorella vulgaris ИФР No. C-111) and Balandinsky pond (Chlorella kessleri ВКПМ A1-11 ARW) is given. The positive role of using the method of correction of algocenosis is shown.

This article discusses the state of atmospheric air. Based on the results of the analysis, an assessment of its pollution levels in the city of Yerevan was carried out. It is shown that the concentration of dust in the atmospheric air has a well-defined annual course. The maximum values of dust concentration are typical for the warm period of the year. The greatest proportion of air pollution is observed in the administrative district of Kentron, the excess of dust content in relation to MPC. 

The article deals with the studies of the bed load of watercourses on the territory of the city of Volsk (Saratov region). The research shows that quartz to be the most widespread rock-forming mineral. As the proportion of quartz decreases, the calcite content increases. Ecologicalgeochemical state of the bed load in spring worsens as compared to summer due to the arrival of pollutants with melting snow from the urban watershed. The bed load with a high content of pollutants should be considered as an object of accumulated environmental damage.

The Earth’s climate system (ECS) is considered as a linear system whose input is a change in the solar constant ΔI( t) and the output is an anomaly of the globally averaged surface temperature ΔT( t). The system input can be affected by other factors, and at the output their own temperature fluctuations and a random noise manifest themselves. All these factors are assumed to be independent of ΔI( t). The spectral analysis of monthly mean values of ΔI( t) and ΔT( t) shows the existence of statistically significant coherence.

The analysis of changes in alcohol consumption by the population of Russia for the period from January 2019 to December 2020 in the context of the development of the COVID-19 pandemic was made. The main psychological and social reasons for the increase in the amount and frequency of alcohol consumption during this period are considered, and a discrepancy between the annual dynamics of alcoholic beverages sales and the development of the epidemic is revealed.

In the article, in a comparative analysis, for the periods from 1991 to 1998, 2015 and 2022, the issues of the territorial prevalence of basal cell skin cancer in Saratov are considered. The residential areas of patients were studied and mapped taking into account risk factors. The result of the study was an oncoecological analysis of urban landscape sites and the creation of a scheme for the active search for early forms of skin cancer.

The article considers the temperature and humidity regime of the Left Bank of the Saratov region in various natural climatic periods of the state of the earth’s climate system – the first wave of global warming, stabilization, the second wave of global warming. It is noted that against the background of rising temperatures from one climatic period to another in the Trans-Volga region, the amount of precipitation in the cold half of the year increases. The trend in precipitation during the warm period is ambiguous.

Spectral analysis of the time series for average annual values of the globally averaged surface temperature anomaly shows the presence of harmonics of the lunar nodal cycle with a period of 18.6 years, which can be used to predict the values of the series. Three models of the series were considered: autoregression AR(p), combined model of autoregression – integrated moving average ARIMA(p,d,q) and artificial neural network. It is shown that the ARIMA(4,1,4) model gives the best results for predicting the global temperature anomaly for three years.

The study is comprehensive and describes the socio-economic zoning of the Russian steppe beltterritory. The method of zoning of the Russian steppe beltterritory is developed on the basis of the studied experience by scientists. The obtained results revealed a high degree of differentiation of the steppe zone of Russia by the level of socio-economic development.