RT null T1 Mass Balance Principle and Examples on the Process, Sectoral and Societal Levels A1 United Nations Environment Programme, A1 United Nations Institute for Training and Research, K1 mercury PB United Nations Environment Programme and United Nations Institute for Training and Research YR 2023 FD 2023-04 LK https://wedocs.unep.org/handle/20.500.11822/42267 UL https://wedocs.unep.org/handle/20.500.11822/42267 NO This lecture explains the mass balance principle and examples on the process, sectoral and societal levels, relationship between mercury mass flows, the UNEP Mercury Inventory Toolkit, and other mercury inventory tools. DS UN Environment Document Repository RD Sep 23, 2026