RT null T1 Diary Methodology A1 United Nations Environment Programme, K1 methodology K1 food waste K1 data recording technique YR 2023 FD 2023-11 LK https://wedocs.unep.org/handle/20.500.11822/44682 UL https://wedocs.unep.org/handle/20.500.11822/44682 DS UN Environment Document Repository RD Sep 19, 2026