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  • Glossary item | Last updated: 04 Jan 2021
Elementary flow

Material or energy entering the system being studied that has been drawn from the environment without previous human transformation, or material or energy leaving the system being studied that is released into the environment without subsequent human transformation.

ISO, 2006a, EN ISO 14040:2006: Environmental management – Life cycle assessment – Principles and frameworks. July 2006.

Source category: Standards