Established in 2019 and based in Hamburg, Germany, the Sustainable Digital Infrastructure Alliance e.V. (SDIA) is a nonprofit network of more than 65 members and partners working to catalyze the transition to a sustainable digital economy. The SDIA brings together stakeholders from across industries and fields, both public and private, to realize its Roadmap to Sustainable Digital Infrastructure by 2030. It is meant to offer a holistic, systems-thinking approach to solving the challenges facing ICT sustainability, ranging from energy supply and data centers, to fiber-optic networks and software.