bicycle touring 2 [vynechat] cykloturistika 2 [vynechat] hiking 2 [vynechat] pešia turistika 2 [vynechat] damage to soils 1 [vynechat] environmental monitoring 1 [vynechat] erózia pôdy 1 [vynechat] monitorovanie životného prostredia 1 [vynechat] ochrana pôdy 1 [vynechat] poškodenie pôdy 1 [vynechat] regional history 1 [vynechat] regionálne dejiny 1 [vynechat] revolutions 1 [vynechat] revolúcie 1 [vynechat] soil erosion 1 [vynechat] soil pollution 1 [vynechat] soil protection 1 [vynechat] znečistenie pôdy 1 [vynechat]