The opening conference of the Sustainability Days entitled “When AI Meets Sustainability: Environmental, Social and Ethical Perspectives” will focus on the social, ethical, and environmental dimensions of artificial intelligence. The keynote lecture by Dr. Prof. Aimee van Wynsberghe will explore these three dimensions, followed by a round‑table discussion with experts from EPFL and ETH Zurich. The conference examines the environmental and societal impacts of AI systems, introduces the concept of Sustainable AI, distinguishes it from AI for Good, and addresses emerging challenges related to governance, digital sovereignty, and democracy.