New challenges to the Montreal Protocol Author Hayman G., Trent S. Journal/Series Connect | Vol. 22(2); 3 - 4; 2 p. Date 1997 Source IUCN (ID: ANA-062728) Publisher | Place of publication UNESCO | Paris, France Document type Article in periodical Language English Field of application International Subject Air & atmosphere Keyword Ozone layer Other references Treaty Montreal Protocol on Substances that Deplete the Ozone Layer Treaty | Multilateral | Montreal | Sep 16, 1987 Keyword: Ozone layer Source: IUCN (ID: TRE-000953)