Reuters: Hungary restarted a plant on Friday that fatally flooded villages with toxic red sludge and some residents evacuated last week returned to their homes despite warnings from environmentalists. A spill of industrial waste last week at an alumina plant in western Hungary, owned by MAL Zrt, killed nine people, injured more than 120 and polluted a tributary of the Danube when the wall of a sludge reservoir failed. The state commissioner who controls MAL’s operations after the …