As everyone knows, COVID-19 and associated lockdowns have reduced electricity demand and increased demand for data. Especially in countries like Sri Lanka which are dependent on imported coal/diesel for production of electricity, there is a great interest in increasing energy efficiency. The IEA has published an interesting report on energy use by data centers and in data transmission. Strong growth in demand for data centre services continues to be offset by ongoing efficiency improvements for servers, storage devices, network switches and data centre infrastructure, as well as a shift to much greater shares of cloud and hyperscale data centres. Hyperscale data centres are very efficient large-scale cloud data centres that run at high capacity, owing in part to virtualisation software that enables data centre operators to deliver greater work output with fewer servers.