Red sludge

The site of millions of gallons of red sludge spilled across West Hungary and pouring into waterways and leading to the deaths of at least five people, brings into sharp relief the environmental impact of the aluminum industry. Bauxite refining generates twice the mass of waste products as it does aluminum end product and the plant in Ajka, Hungary, is just one of dozens of plants across the globe that between them produce 70 million tons of red sludge.