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Le quasi 300 persone residenti nella zona del Politecnico a Zurigo alle quale domenica mattina era stato ordinato di lasciare le proprie abitazioni hanno potuto fare rientro a casa dopo circa 6 ore. L’istituto federale ha smaltito con successo il gas pericoloso che si trovava in un vecchio laboratorio di ricerca.
L'area interessata dalle misure di sicurezza adottate per il trasporto della bombola
Le bombole di trifluoruro di cloro sono state trasferite in un contenitore studiato appositamente ed evacuate da una ditta specializzata, indica la polizia cantonale in un comunicato.
La sostanza altamente tossica e infiammabile in passato veniva utilizzata dai ricercatori federali per analizzare campioni di roccia.
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