Addressing the signifi cant energy consumption from digital appli- cations and systems, the document highlights the urgent need to develop and use low-energy consuming solutions to meet global climate targets. The widespread use of AI and LDTs increases this demand, necessitating careful assessment and reduction of energy requirements while ensuring effective performance. The proposed solution involves designing systems with energy effi ciency as a core principle. This includes resource-effi cient development methodologies, such as using effi cient programming languages and optimizing system usage to minimize unnecessary energy consumption. Emphasis is placed on green hosting options and effi cient data processing to reduce carbon emissions. The learning unit covers strategies for creating sustainable digital systems, including energy-effi cient architecture and green hosting practices. It also addresses user behavior modifi cations and system design alterations, such as dark mode usage and optimized data queries, to minimize energy consumption. The unit encourages tracking and transparency of energy use to promote awareness and responsible computing.