Recommendation ITU-T L.1410 deals with the environmental impact assessment of ICT Goods, Networks and Services. It is organized in two parts: " Part I "ICT life cycle assessment: Framework and Guidance". " Part II "Comparative analysis between ICT and reference product system (Baseline scenario); framework and guidance. Part I deals with the life cycle assessment (LCA) methodology applied to ICT goods, networks and services (ICT GNS). Part II deals with comparative analysis based on LCA results of a ICT GNS product system and a referenced product system. The document provides specific guidance on Energy and Greenhouse Gas (GHG) impacts.