Researches and applied lichenological studies carried out in Slovakia were reviewed, with reference to the period 1960–2020. Field studies and reviews devoted to the causal relation between environmental pollution and lichens are presented, encompassing the use of biodiversity and bioaccumulation techniques as well as ecophysiological parameters in native and transplanted lichens. The review includes pioneering up to recent monitoring studies of air pollution effects in urban and industrial areas, monitoring changes in species distribution between the nineteenth and twentieth centuries due to atmospheric pollution and habitat alteration, the retreat of sensitive species (with a focus on Lobaria pulmonaria (L.) Hoffm.), as well as recent regional and large-scale biomonitoring in forests. Beside urban pollution, the topics cover copper and mining activities, mercury pollution, magnesite and aluminium production, steel and cement industry. Finally, also indoor biomonitoring has been considered. Keywords Bioaccumulation . Biomonitoring . Biodiversity . Heavy metals . Sulfur dioxide . Western Carpathians.