Much to study here re production sludge from metal’s production; storage reservoirs; dam construction and why it burst; and of course, the long term results if the toxic waste makes its way toward and into the Danube River. This is often the fear of many that protest sludge reservoirs proposed above Bristol Bay (Pebble Mine) and elsewhere in the U.S. and Canada.

Ajka, Hungary Toxic Flood & Soldier

“Environmental Affairs State Secretary Zoltan Illes called the spill an “ecological catastrophe,” and Hungarian Prime Minister Viktor Orban acknowledged that authorities were caught off guard by the disaster. Orban said the alumina plant and reservoir had been inspected only two weeks earlier and no irregularities had been found. Red sludge is a byproduct of the refining of bauxite into alumina, the basic material for manufacturing aluminum. It is common to store treated sludge in ponds where the water eventually evaporates, leaving behind a dried red clay-like soil…”  (more)