The field of sustainable energy systems is moving towards a more integrated and efficient approach, with a focus on optimizing the production and consumption of renewable energy. Researchers are exploring new methods to enhance the economic feasibility of green hydrogen systems, such as optimizing deployment strategies and leveraging real-time data to minimize emissions and production costs. The development of smart grid technologies is also crucial, with a focus on managing energy demand and supply in real-time to reduce congestion and emissions. Noteworthy papers in this area include: The paper on Spatio-Temporal Life Cycle Analysis of Electrolytic H2 Production in Australia, which presents a novel approach to enhancing hydrogen production by aligning it with periods of low-carbon intensity on the electricity grid. The paper on Grid congestion stymies climate benefit from U.S. vehicle electrification, which highlights the critical role of transmission infrastructure in enabling or constraining emissions reduction from vehicle electrification.