Ozonabbauende Chemikalien wie Tetrachlorkohlenstoff (CCl₄) oder bestimmte Fluorchlorkohlenwasserstoffe (FCKWs) werden zwar nicht mehr in Kühlschränken und Schaumstoffen eingesetzt – in industriellen Prozessen dienen sie jedoch weiterhin als Ausgangsstoffe für moderne Kältemittel und Kunststoffe. Bisher blieben diese sogenannten Feedstock-Chemikalien unter dem Radar internationaler Abkommen,
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