The paper considers the problems of the formation of a young science - geoecology, which studies the relationship between man and nature and is based on the data obtained by the "classical" sciences - physics, chemistry, biology and medicine. Much attention is given to the study of the role and place of biogeochemical concept in the formation of the new science's theoretical foundation. The authors study the significance of zonal, natural and anthropogenic factors in biogeochemical circulation of substances, using as an example the results of model territories research (the model territories being Urengoy tundra, Norilsk plateau, taiga in the Northwestern part of Russia and steppes of South Urals). It is shown that as tecnogenic load increases, the role of natural factors in biogeochemical cycles decreases, new types of biogeochemical circulations apper, and the stabilizing role of soil and vegetation in the processes of geosystems' self-regulation becomes more pronounced.