The river Tisza, which originates in Ukraine, is among the most polluted rivers in the European Union. It flows through five countries before joining the Danube, carrying its waste all the way to the Black Sea. These five countries are Ukraine, Romania, Slovakia, Hungary, and Serbia. Numerous tributaries from these countries also feed into the Tisza, bringing additional pollution. It is therefore crucial to have as many river-rescuers as possible in these countries — volunteers who have gained knowledge about rivers and plastic pollution, and who are ready to take part in river-cleaning actions.
