Can GPP indeed represent the lever to unhinge the rigidity of the “production-consumption-discard” model characteristic of a linear economy in order to bend it towards a circular one? It would seem so, especially if we look at the excellent GPP practices adopted in some European countries and the results they obtained for the environment and local economies. The usefulness of GPP (Green Public Procurement) for the new desired model lies in the complex and structural reasons, of which the most intelligible is the widespread use of renewed materials, derived from waste recycling, which GPP hopes for and sometimes (for example in Italy)(1) forces onto public administrations. Indeed, if we go through European environmental criteria, one of the most widespread ones is the te...