RT null T1 The Evolution of International Environmental Law: Sources and Overview on Multilateral Environmental Agreements (MEAs) A1 United Nations Environment Programme, K1 environmental law K1 environmental agreement YR 2018 FD 2018 LK https://wedocs.unep.org/handle/20.500.11822/27558 UL https://wedocs.unep.org/handle/20.500.11822/27558 NO https://www.unenvironment.org/explore-topics/environmental-governance DS UN Environment Document Repository RD Sep 16, 2026