Lime is a versatile and inexpensive natural base material that is widely used worldwide. Used by the steel, construction and chemical industries, in agriculture, for soil and waste treatment, lime is also used, with the help of the best technologies, as a natural reagent for civil and industrial wastewater treatment, for the sanitisation of biological sludge, the purification of fumes from incinerators and thermal power plants, and is certainly the most environmentally compatible material in terms of costs and benefits.