On the 17th of September 2021, following the football activity, a mixed basketball match was organized, in which boys and girls of 8 – 10 years participated, players of the “Dinamo” Basketball Club Under 18. This activity was initiated with a short information about World Ozone Day 2021, Vienna Convention and Montreal Protocol on Substances that Deplete the Ozone Layer and the importance of the ozone layer protection. All boys and girls were encouraged to deliver this information to their friends and stimulating them to be the first to start this peer-to-peer campaign for the benefit of a healthier life in their future. At the end of the activity, the students were rewarded with T-shirts, masks and hats with the logo of World Ozone Day 2021.