[1] Jan Evangelista Purkyne Univ Usti nad Labem, Fac Environm, Dept Environm Studies, Usti Nad Labem 40096, Czech Republic
[2] Jan Evangelista Purkyne Univ Usti nad Labem, Fac Educ, Dept Presch & Primary Educ, Usti Nad Labem 40096, Czech Republic
[3] Masaryk Univ, Dept Environm Studies, Jostova 10, Brno 60200, Czech Republic