RT null T1 Estimating GPP Impacts for the City of Berlin: Methodology for Calculating Potential Economic and Environmental Savings A2 McLennan, Ashleigh K1 green economy K1 government purchasing K1 product quality K1 Germany PB United Nations Environment Programme YR 2022 FD 2022-06 LK https://wedocs.unep.org/handle/20.500.11822/40134 UL https://wedocs.unep.org/handle/20.500.11822/40134 DS UN Environment Document Repository RD Sep 17, 2026