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The tourism industry is concentrated within the boundaries of the Subcarpathia Forestry District of Ukraine. These are mostly resort complexes with recreation houses, hotels and restaurants. Since the issue of solid household waste processing has not been resolved in Ukraine, landfills are emerging near recreation facilities. Undoubtedly, such a situation contradicts the improvement processes, because landfills are objects of detonation of dangerous substances and compounds getting into all components of the environment due to geochemical flows. It was established that chemical elements of the toxic group and biogenic elements accumulate. The traces of individual elements were also determined. The Bronytskyi landfill is the most polluted with the following chemical elements: Pb (3.56 - 4.06 mg/kg), Zn (2.84 - 3.67 mg/kg), Gd (0.021 - 0.033 mg/kg), P (457.3 – 609.7 mg/kg), K (9.7 – 14.6 mg/kg), Ca (174.7 – 237.7 mg/kg), Ga (3.58 – 5,98 mg/kg), La (1.09 – 1.24 mg/kg), Y (0.013 – 0.014 mg/kg), Cd (0.15 – 0.176 mg/kg), Sn (0.013 – 0.018 mg/kg ), Nd (0.029 – 0.046 mg/kg), Eu (0.022 – 0.036 mg/kg) and Th (0.05 – 0.078 mg/kg). The site of the Boryslav landfill is most polluted in the western side - Fe (16.06 - 19.72 mg/kg), Cu (0.37 - 0.43 mg/kg), Gd (0.003 mg/kg), Si (43 – 58.2 mg/kg), P (782.4 – 995.5 mg/kg), Ca (88.6 – 104.7 mg/kg), Mn (1.7 – 2.7 mg/kg) , Sc (0.009 mg/kg), Cr (1.069 – 1.255 mg/kg), Y (0.015 – 0.016 mg/kg), Nd (0.016 – 0.018 mg/kg). In the eastern side of the Stryi landfill the presence of the following elements is most evident - Fe (18.98 - 27.97 mg/kg), Ni (0.09 - 0.21 mg/kg), Zn (0.14 - 0.19 mg/ kg), Pb (0.05 - 0.1 mg/kg), Al (1.6 – 2.0 mg/kg), P (718.1 - 652.5 mg/kg), Mn (2.5–3.5 mg/kg), Ga (0.01 mg/kg), La (0.02–0.04 mg/kg), Cr (0.009–0.013 mg/kg), Ge (0.214 – 0.551 mg/ kg), Cd (0.014 - 0.02 mg/kg), Nd (0.017 - 0.037 mg/kg), Th (0.009 - 0.016 mg/kg). Such a detailed chemical analysis for the presented objects of research is carried out for the first time.

Fires in natural ecosystems have a detrimental effect on all biota components. In the global scale, many scientific studies of prominent scientists are devoted to this topic. It should be noted that scientists have always been interested in the influence of thermal destruction of soil genetic horizons on the specific activity of radionuclides. Most of these studies began after the Chernobyl (1986) and Fukushima (2011) radiation disasters. Our research is focused on the specific activity of radionuclides due to the thermal effects of fires in natural ecosystems. It has been established that edaphotopes affected by fires are naturally restored causing the restoration of soil formation processes. The specific activity of radionuclides decreases with the duration of the ground fire. Comparing the obtained data with the regulatory documentation, it was found that they do not exceed the minimum significant activity of radionuclides in the workplace. However, the increased activity of radionuclides in soils has a detrimental effect on the ecological condition and flora and fauna development. During the fire season in natural ecosystems and forests, careless handling of fire should be avoided and preventive measures should be taken to inform the public about the harmful effects of wildfire.

Negative effects of the urban environment on the morphological and physiological states of Thuja occidentalis 'Smaragd' have been investigated. For comparison, two plots were selected for the cultivation of eastern arborvitae cultivars: one in a public garden (the control plot) and the other one in street planting with its positive vertical temperature gradient associated with overheating and dehydration of the soil. This situation had a negative impact on the biometric and physiological parameters of the plants, and, in the end, the level of their vitality. If, under optimal growth conditions, the vertical temperature gradient is negative (in the crown the air temperature is higher and the soil temperature in the rhizosphere zone is lower), physiological processes in Thuja ocidentalis 'Smaragd' (transpiration, water-holding capacity) proceed in a normal mode. A change in the temperature regime (soil temperature is higher than the air temperature in the crown), under conditions of a positive temperature gradient, leads to negative consequences: the morphological structure of plants changes (the growth of the apical and side shoots slows down, the number of needles increases, the lower parts of the trunks get bared, the length and volume of the crown are reduced), also physiological processes are disturbed - moisture deficiency increases, water holding capacity decreases, the needles' pigment composition changes towards decreasing the amount of chlorophylls (a + b) and carotenoids. A decrease in the vitality level of the study plants with a positive temperature gradient was confirmed by the vitality indices Rfd established by the fluorescence means (negative gradient 0.64; positive gradient 0.33).