https://www.techuk.org/resource/cloud-computing-and-the-journey-to-net-zero.html
According to a report by Accenture, cloud utilisation can reduce carbon emissions by 35-45% compared to legacy IT. This is supported by recent research into the energy efficiency of European data centres that suggests the higher utilisation rates and more frequently updated technology of cloud infrastructure could reduce energy usage of running business applications by nearly 80% when compared with on-premises enterprise data centres. Data from Google on electricity savings resulting from a move to cloud paints a similar picture.