Summary: The article considers the dynamics of the level of air pollution in Krasnoyarsk 25 years. Analysis of the received information indicates a decrease in the level of contamination, since 1992, 8 times. Installed substances that make the greatest contribution to environmental pollution (50% of nitrogen dioxide, 25% - fluoride), have a significant technological impact on the natural complex of the city and causing a modification of its biotic components.

Keywords: man-made impacts, the maximum allowable concentration, urban environment, green spaces.