So, there's a big river called the Danube that goes through a bunch of different countries in Europe. And because the river is important for lots of reasons, like providing water for people and animals, it needs to be protected.
To make sure everyone is working together to keep the river healthy, some important people from each country (kind of like grown up ambassadors) decided to form a group called the International Commission for the Protection of the Danube River.
This group makes sure that each country is doing their part to keep the river clean and safe. They also share information and make plans for emergencies, like if there's a big flood or something else that could harm the river.
Basically, the International Commission for the Protection of the Danube River helps make sure that the river stays healthy and strong for all the people and animals that depend on it!