The number of those who have died because of the toxic sludge leaked from an alumina plant in Hungary is now five. Teams working inThe number of those who have died because of the toxic sludge leaked from an alumina plant in Hungary is now five. Teams working in the area affected by the environmental catastrophe reported the news. . . the area afThe number of those who have died because of the toxic sludge leaked from an alumina plant in Hungary is now five. Teams working in the area affected by the environmental catastrophe reported the news.