Acknowledgements This Technical Report was researched and written by Daniela Torres (Telefónica), Jara Forcadell Ortiz (MSc on Smart Cities at University of Girona, Spain) and Mythili Menon (University of Geneva) and as a contribution to ITU‐T Focus Group on Smart Sustainable Cities (FG‐SSC). Special thanks are due to Angelica Ospina (University of Manchester), Giampiero Nanni (Symantec Corporation), Juan Manuel Sabio Morchio (University of KwaZulu‐Natal, South Africa), Marc Gil (MSc on Smart Cities at University of Girona), Amanda Mc Intosh (Carlo‐Schmid Programme), Chris Ip (University of Toronto), José Miguel Fernández Güell (Universidad Politécnica de Madrid), Ziqin Sang (Fiberhome), Guilherme Canela (UNESCO) and Silvia Guzmán (FG‐SSC Chairman) for their helpful review and contribution. 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.