 The study estimates that between 2010 and 2030, communication technology, CT, will consume up to 51% of global electricity, with the proportion of use-stage electricity by consumer devices decreasing and being transferred to networks and data centers. However, renewable electricity is expected to exceed the demand of all networks and data centers until 2030. The analysis suggests that CT could contribute up to 23% of globally released greenhouse gas emissions in 2030. This article was authored by Anders S. G. Andre and Tomas Edler.