A "red slurry" has been leaked by a Hungarian metals plant reservoir and caused 100 people there to suffer chemical burns. The sludge has been treated and its pH level reduced, easing fears over its impact as it reaches the Danube River. Toxic sludge in Hungary reportedly reaches the Danube River (video) | cleveland.com What is this stuff? What happened that Hungary had this disaster? I love how blithely the reporter dismisses the possibility of harm to the environment. No, no problem...its just water. Jeeze Louise.