The Danube is 2,857 km long.
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- The deepest waters of the Black Sea extend to depths of well over two kilometers.
- There is more life in one acre of a healthy wetland than there is in one acre of almost any other kind of habitat.
- Species loss in freshwater ecosystems is faster than anywhere else on Earth. There is a more than 50% decline in freshwater species populations over the past 30 years.