In October 2010 , approximately one million cubic meters of red mud from an alumina plant near Kolontár in Hungary was accidentally released into the surrounding countryside in the Ajka alumina plant accident , killing ten people and contaminating a large area . All life in the Marcal river was said to have been " extinguished " by the red mud , and within days the mud had reached the Danube . However , the long-term environmental effects of the spill have been very minor
Ajka alumina plant accident
Ajka alumina plant accident
Bauxite tailings