Gramercy, Louisiana, US. Red mud waste material is pumped on to the upper surface of a massive waste impoundment in a water slurry. The impoundments are essentially very large shallow bowls, engineered to de-water the slurry through evaporation and an internal drainage system fed by an arrangement of funnel-like decant points where water collects in pools. (Photo by J. Henry Fair/Industrial Scars/Papadakis Publisher)
