WINNER:
Savez speleoloških organizacija Srbije (engl. Federation of Speleological Organizations of Serbia)

With the Project:
Inicijativa „Čisto podzemlje – Srbija“ (engl. Initiative "Clean underground - Serbia")

Clean Underground – Serbia is a volunteer-driven initiative focused on protecting karst water by removing waste from caves and raising public awareness to prevent future pollution. Over three years, the project cleaned caves in four Serbian regions, removing 58 square meters of garbage and restoring two caves to their natural state. These efforts have improved drinking water quality for 260,000 people and protected the habitat of endemic species. The initiative also created a database of polluted caves and aims to educate young people on the importance of karst water protection for long-term sustainability.