povodne protipovodňová ochrana 12 [vynechat] floods 8 [vynechat] prírodné katastrofy 4 [vynechat] lesné hospodárstvo 3 [vynechat] ekológia lesa 2 [vynechat] flood control 2 [vynechat] hydrológia 2 [vynechat] katastrofy 2 [vynechat] lesnícka hydrológia 2 [vynechat] lesnícky manažment 2 [vynechat] natural disasters 2 [vynechat] air quality management 1 [vynechat] architektonické pamiatky 1 [vynechat] banské nešťastia 1 [vynechat] biodiversity 1 [vynechat] biodiverzita 1 [vynechat] climate changes 1 [vynechat] earthquake 1 [vynechat] ecosystems 1 [vynechat] ekologické škody 1 [vynechat] ekosystémy 1 [vynechat] environment 1 [vynechat] environmental law 1 [vynechat] environmental protection 1 [vynechat] geological conditions 1 [vynechat] geologické pomery 1 [vynechat] ground water hydrology 1 [vynechat] groundwaters 1 [vynechat] hurikány 1 [vynechat]