Acknowledgements This Technical Report was researched and principally authored by Silvia Guzmán Araña, FG‐SSC Chairman. The author would like to first thank ITU for providing such an exciting opportunity to work and research under the ITU‐T Focus Group on Smart Sustainable Cities (FG‐SSC). Special thanks goes also to Ziqin Sang (Fiberhome Technologies), Mythili Menon (University of Geneva), Daniela Torres (Spain), Ramy Ahmed Fathy (NTRA, Egypt), Lei Gu (China Telecom), Michael Mulquin (IS Communications Ltd), Sabrina Coccia (Smart Metropolis), John Devaney (BSI) and Angelica Ospina (University of Manchester). Additional information and materials relating to this report can be found at: www.itu.int/itu‐t/climatechange. If you would like to provide any additional information, please contact Cristina Bueti at tsbsg5@itu.int.