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A recent large-scale modelling study has shown that restoring floodplains and reconnecting cut-off water bodies with the Danube River, and its tributaries could play a significant role in improving water quality and removing nitrate pollution in the Danube River Basin.

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.