Table of Contents - L.1450 (12/2025) - Methodologies for the assessment of the environmental impact of the information and communication technology sector

1	Scope
2	References
3	Definitions
	3.1	Terms defined elsewhere
	3.2	Terms defined in this Recommendation
4	Abbreviations and acronyms
5	Conventions
6	Principles
7	Guidance on how to use this Recommendation
8	Part I: The methodology for calculating the ICT sector footprint with respect to life cycle GHG emissions
	8.1	General principles
	8.2	A tiered approach for assessment
	8.3	Assessment procedure
	8.4	Goal and scope
	8.5	Data collection
	8.6	Data collection and modelling
	8.7	Calculation of footprint per category of goods
	8.8	Aggregation of results: ICT sector footprint calculation
	8.9	Interpretation
	8.10	Reporting
	8.11	Critical review
9	Part II: The methodology for defining a GHG emissions budget for the ICT sector considering a 2ºC or lower trajectory
	9.1	General
	9.2	A procedure for defining the 2 C trajectory for the ICT sector
Annex A – ICT sector boundaries
	A.1	Introduction
	A.2	ICT end-user goods
	A.3	ICT network goods
	A.4	Data centre
	A.5	ICT service
	A.6	Allocation between the four main categories
Annex B – Global warming potential values for a 100-year time frame
Annex C – Reporting formats and template for alignment with methodology provisions
Appendix I – Deriving the sector substructure from the OECD sector definition
Appendix II – GHG global trajectories to 2100
	Page
	II.1	Introduction
	II.2	RCP2.6 (also sometimes referred to as "RCP3-PD"): A "peak and decline" scenario
	II.3	RCP4.5: A "stabilization scenario"
	II.4	RCP6.0: A "climate-policy intervention scenario"
	II.5	RCP8.5: A scenario of "comparatively high greenhouse gas emissions" or "business as usual"
Appendix III – Deriving the ICT sector footprint from the organizational perspective
Appendix IV – Example of application of the ICT sector footprint methodology on use stage GHG emissions of networks
	IV.1	Define the goal and scope of the ICT sector footprint study
Appendix V – Example of electrical energy for one server
Appendix VI – Data coverage for each tier of assessment
Appendix VII – Considerations on Telecommunication satellites
Appendix VIII – Considerations on IoT devices
	VIII.1	IoT inventory and their traffic models
	VIII.2	On the scope of IoT with regard to ICT sector impact assessment
Appendix IX – Guidance on depreciation of embodied emissions
Appendix X – Example – ICT sector footprint in 2020
	X.1	Introduction
	X.2	Data
	X.3	Total results
Bibliography