The environment is combination of its natural environmental components (atmospheric air, surface water and groundwater, soil, subsoil), landscape and objects, which define the living conditions of human, habitats for animals, plants and other living organisms.

Environmental contamination is high content of physical, chemical and biological reagents in it, which are not typical for this environment, brought externally, the presence of which leads to negative consequences. Emissions and discharges are the main source of contamination of atmospheric air, water and soil on regional and global scales.

Environmental assessment is carried out by the help of the synthesis and analysis of consistent monitoring (periodic and current), focus and intensity of changes, comparison of obtained indicators with the standards of environmental quality taking into account possible environmental damage.