Materials play a central role in all aspects of new technologies needed to achieve sustainability goals and address climate change. New materials are needed for exploitation of renewable carbon-free energy sources and for energy storage that supports efficient use of energy. Materials designed for efficient use through recycling and reuse, or designed to be biodegradable to minimize environmental impact are also needed. Development of new reduced-carbon processes for making materials, especially those made in large quantities, will also be critical in achieving climate goals. Examples of ongoing research on innovative approaches to these challenges will be highlighted in this year’s Materials Day symposium.