Landscape ecology krajinná ekológia 3 [vynechat] Biodiversity 1 [vynechat] Coal mining 1 [vynechat] Environment 1 [vynechat] Environmental pollution 1 [vynechat] Geography 1 [vynechat] Geology 1 [vynechat] Information science 1 [vynechat] Natural sciences 1 [vynechat] Nature conservation 1 [vynechat] Teaching school subjects 1 [vynechat] Wetlands 1 [vynechat] biodiverzita 1 [vynechat] didaktika vyučovacích predmetov 1 [vynechat] geografia 1 [vynechat] geológia 1 [vynechat] informatika 1 [vynechat] mokrade 1 [vynechat] ochrana prírody 1 [vynechat] prírodné vedy 1 [vynechat] znečistenie životného prostredia 1 [vynechat] ťažba uhlia 1 [vynechat] životné prostredie 1 [vynechat]