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The article contains information on the breeding of Heracleum Sosnowskyi for cultivation as a forage crop in the post-Soviet period. Information about the ecological danger of the spread of this plant is given. Its juice contains furocoumarins, which, when exposed to human skin under the influence of ultraviolet rays, cause serious burns on the surface of the body. The article presents materials testifying to the increased adaptability of the Heracleum Sosnowskyi to the habitat conditions and its high fertility. The spread of Heracleum Sosnowskyi in urban areas (in parks, playgrounds on undeveloped lands, etc.), as well as in rural settlements of the country, due to the environmental hazard for people, leads to the removal of land from economic circulation. The authors of the article have established the regions and reasons for the spread of Heracleum Sosnowskyi in the European part of Russia. The substantiation of the monitoring of lands for the registration of habitats of this dangerous for the ecosystem is given. The article provides information on assessing the extent of the spread of Heracleum Sosnowskyi in the territory using remote sensing using unmanned aerial vehicles. The article discusses measures to combat Heracleum Sosnowskyi.

The spatial structure of the St. Petersburg metropolitan area and the system development of the territory based on the Master Urban Development Plan of St. Petersburg was analyzed. Perspective territories for housing, located in the north-west and south of the city were examined. The structure of housing development in the first agglomeration zone was described. Alluvial territories in the Gulf of Finland near the city for housing development was analyzed.

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