Glass fibres, existing in a wide range of types for several ends uses, made by melting silica (sand material) at very high temperatures and adding to the melt the necessary fabrics. High temperatures always incur substantial energy costs. The extraction of the metal oxides from minerals in which they are present in the ground includes purification processes. It is a matter for concern regarding the use of energy, the need for massive extraction or refining equipment and the production of large quantities of pollution. Glass belong to the group of inorganic fibres.