Acknowledgements This Technical Report was developed and authored by John Smiciklas (BOMA Canada), Frank Spitzer (IBI Group), Alec Hay (University of Toronto), Rosa Delgado (World Trade Center Association) and Sekhar Kondepudi (National University of Singapore). Additional information and materials relating to this Technical 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.