The International Telecommunication Union (ITU) and the European Telecommunications Standards Institute (ETSI) jointly organized the "ITU-ETSI Symposium on ICT Sustainability: Standards Driving Environmental Innovation", held on 11–12 December 2024 at ITU Headquarters in Geneva, Switzerland. It brought together industry leaders, policymakers, researchers and stakeholders to explore the crucial role of standards in promoting sustainable ICT practices. Standards guide the development of technologies that minimize environmental impact and enhance energy efficiency.