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Il Consiglio federale ha adottato il mandato negoziale concernente la convenzione di Vienna e il protocollo di Montréal relative alla protezione dello strato di ozono, su cui si discuterà dal 17 al 21 novembre a Parigi.
In concreto, ciò significa che la Svizzera s'impegnerà per inasprire la regolamentazione sull'uso degli idrofluorocarburi.
Grazie all'adozione dei vari trattati, le emissioni di sostanze nocive sono sensibilmente diminuite, ma bisognerà attendere ancora a lungo prima che l'ozonosfera ritrovi lo spessore che aveva anche solo nel 1980, indica una nota.
ATS/dg
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