Szukana fraza: [Abstract = "The analysis of landscape changes was made at some extraction sites in urban or suburban areas in the Wielkopolska Region\: Poznań, Kalisz, Jarocin, Krotoszyn, Ostrów Wlkp., Mikstat. Data were taken from topographical maps, aerial photographs and landscape observation in\-situ. The study of abandoned small\-scale mines showed that after the termination of mining activity the ecosystem may recover spontaneously, if results of excavation have not destroyed the environmental conditions."]

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