Hungary battles to stop toxic mud reaching River Danube
6 October 2010 Last updated at 06:55 BST
Hungary says it will cost tens of millions of dollars and take at least a year to clean up the damage caused by a spill of industrial toxic red sludge.
Emergency workers are trying to stop the spill, from an alumina plant, from flowing into major waterways, including the River Danube
A state of emergency has been declared in three western counties after the chemical waste burst from a reservoir.
Nick Thorpe reports.