A plume of foam in bauxite waste at an aluminum manufacturing plant. Bottom ash disposal pond at coal-fired power plant. Phospho-gypsum fertiliser waste. Run-off pond at Rio Tinto Mine. Coal ash waste at electricity generation station. Herbicide manufacturing plant. Heavy metal waste from fertiliser production. The inside of a holding tank at an oil sands upgrader facility. Hog faecal waste lagoon. Herbicide manufacturing plant.