Information and communication technology (ICT) is accounting for a non-negligible fraction of the world’s greenhouse gas emissions. Reducing the environmental footprint of computing is a non-trivial endeavor because it requires a holistic approach encompassing both the embodied and operational footprint of computing; there is a risk for rebound effects; decarbonizing the manufacturing process and energy provisioning is not a panacea; and there is inherent data uncertainty. The key objectives of the project are to: (1) Develop novel methodologies for sustainability-aware processor design, including ways to deal with the inherent data uncertainty while accounting for both the embodied and operational footprint of computing devices. (2) Revisit and explore sustainable processor design options. (3) Apply the methodologies and architecture insights to re-architect server as well as embedded/mobile processors considering sustainability.