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The article is dedicated to the issues of sustainable development of territories with cumulative environmental damage on the basis of improving environmental analysis techniques of forest ecosystems health in Baikal region. The authors discuss the processes related to degradation of dark coniferous forests due to the emissions of pulp and paper industry. The factors affecting the development and producing capacity of forest stand are pointed out, namely highly acidic soil and heavy metals pollution. The data obtained by X-ray fluorescence analysis of needles are presented. They prove the presence of 20 chemical elements in the forest forming species of Pinaceae: Abies sibirica, Pinus sylvestris, Pinus sibirica, Picea obovata. The elemental composition of needles after the enterprise was closed is not over the exposure limit for conditionally toxic elements. The territory where the research was carried out is suitable for agriculture, tourism and recreational activities. The obtained data were used to implement new techniques of inspecting forest vegetation health.

Elemental Composition of Needle Foliage of Pinaceae Forest Forming Species in the Territory with Cumulative Environmental Damage (South Baikal Region)