Recommendation ITU-T L.1450, which forms part of the ITU-T L.1400 series, consists of two parts: 1) Part I: The methodology for calculating the information and communication technology (ICT) sector footprint with respect to life cycle environmental impact including greenhouse gas (GHG) emissions; 2) Part II: The methodology for defining GHG emissions budget for the ICT sector considering a 2 C or lower trajectory. Appendix IV gives an example of a partial ICT sector footprint derived in line with Part I of the Recommendation. Appendix X gives an example of the entire ICT sector footprint.