RT null T1 Extension of the delivery date for the sixth Global Environment Outlook report A1 United Nations Environment Programme, YR 2017 FD 2017-12-20 LK https://wedocs.unep.org/handle/20.500.11822/31027 UL https://wedocs.unep.org/handle/20.500.11822/31027 DS UN Environment Document Repository RD Sep 18, 2026