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La Svizzera consuma molte più materie prime rispetto alla media europea, ossia 34,4 tonnellate per abitante nel 2013, contro le 18,4 per l'Europa. E’ quanto emerge da uno studio condotto con un nuovo sistema di calcolo testato dall'Ufficio federale di statica (UST), in virtù del quale si è determinata la cosiddetta "impronta materiale", tenendo conto anche delle esportazioni.
Anche considerando solo i beni consumati in Svizzera, i confederati raggiungono quota 17,1 tonnellate di materie prime per abitante, contro le 14 tonnellate in Europa. Lo scopo di questo nuovo calcolo è di quantificare le materie prime usate per coprire i nostri bisogni, ha spiegato al quotidiano Le Temps Florian Kohler, autore del rapporto dell'UST.
Per un telefono portatile o un orologio, per esempio, non si calcola più solo il peso delle varie componenti, ma pure tutte le materie prime che sono state estratte per fabbricarlo e trasportarlo. È questa appunto "l'impronta materiale" del prodotto, in inglese Raw Material Imput (RMI).
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