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Danube Basin, 29 June 2016. Creative events for children, behind-the-scenes tours in water management institutes, field visits in nature reserves: Danube Day reflects the diversity of the Danube River Basin. Join tens of thousands of people in 14 countries to celebrate the biggest river festival in the world.

Kolotar, 4 October 2010. The acute toxic risk deriving from the heavy metals in the red sludge is rather low, as their concentrations are rather low. However, the chronic toxicity threat is high.