VOICED: Hungary toxic sludge spill reaches Danube

The transcript discusses a pollution incident in the Danube, Central Europe's largest waterway. It highlights the rising pH levels indicating serious alkalinity and the challenges faced by filtration systems. Authorities are attempting to mitigate the environmental damage by diverting plaster into the tributary. The impact on aquatic life is significant, with fish being pushed upstream to avoid contamination. The leak from an alumina plant has resulted in fatalities and injuries, with over a million cubic meters of toxic sludge threatening to contaminate the entire region.

How many people have been affected by the incident mentioned in the text?

What is the potential risk to the region as a result of the toxic sludge entering the river?