以上来源于: WordNet
Huge quantities of gypsum and chemical fertilisers have been added to the waters of the Marcal and Raba rivers.
BBC: Toxic sludge carpets homes in Hungary
Plaster has been poured into the Marcal river in a bid to bind the sludge and stop further flooding.
BBC: 'One year' to clean toxic spill in Hungary
Gypsum was being dropped into the Marcal river from helicopters to neutralise it.
BBC: Hungary sludge death toll rises after two bodies found
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