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I flussi di materia

Dal punto di vista ambientale è da qualche tempo presente una metodologia di quantificazione dei flussi di materia di un sistema socio-economico costruita in maniera da essere facilmente confrontabile con alcuni indicatori di tipo economico e, in sintesi, di fornire un quadro da opporre al PIL sull’appropriazione di risorse e sullo scarico di rifiuti di un sistema socio economico sull’ecosistema terra. Tale metodologia, definita come Material Flow Analysis (o Material Flow Accounting), permette di ottenere una stima delle dimensioni fisiche del sistema esaminato, il che significa anche quantificare l’utilizzo di risorse e gli impatti sull’ambiente che questo provoca. L’obiettivo della MFA è fornire dati in grado di descrivere le pressioni ambientali di un sistema ma anche di aiutare nel monitoraggio di politiche finalizzate ad una riduzione di queste ultime. Attraverso tale metodologia è possibile costruire un bilancio del sistema esaminato che fornisca i dettagli della sostenibilità o dell’insostenibilità del sistema stesso, e che ragguagli sull’incremento di stock e beni durevoli dello stesso.

A cura di Alice Benessia, Maria Bucci, Simone Contu, Vincenzo Guarnieri.

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