RT null T1 Handbook for the Montreal Protocol on Substances that Deplete the Ozone Layer - Eighth edition (2009) A1 United Nations Environment Programme, K1 climate change K1 climate change adaptation K1 climate change mitigation K1 ozone depletion potential K1 ozone layer K1 ozone layer depletion K1 global warming K1 international cooperation K1 environmental agreement PB United Nations Environment Programme SN 9966-7319-0-3 YR 2009 FD 2009 LK https://wedocs.unep.org/handle/20.500.11822/8745 UL https://wedocs.unep.org/handle/20.500.11822/8745 DS UN Environment Document Repository RD Sep 17, 2026