RT null T1 Deependra Pourel A1 United Nations Environment Programme, K1 energy efficiency YR 2018 FD 2018 LK https://wedocs.unep.org/handle/20.500.11822/25245 UL https://wedocs.unep.org/handle/20.500.11822/25245 NO Deependra Pourel DS UN Environment Document Repository RD Sep 21, 2026