Anna Podmanická (19) and Tomáš Čermák (18) are two talented young scientists and global winners of the prestigious Earth Prize 2025. This week we delve into their innovative project PURA – a groundbreaking approach to water purification. The conversation explores the limitations of current purification methods, particularly the failure of the quaternary phase to remove antibiotic residues, a major contributor to the growing problem of antibiotic resistance. Anna and Tomáš explain how PURA combines photocatalysis and cold plasma technology to provide an effective and sustainable solution to this urgent global issue. The new episode of Slovak Sound Check focuses on the essential verb to be – "byť".