This book provides a broad view of the gaps and opportunities related to the ongoing energy and chemistry transition, particularly in the science and technology, as well as complementary aspects, including societal ones, needed to unlock the future of renewable energy and chemistry through catalysis. It provides background and complementary aspects that are needed to understand the future scenarios to identify priorities and missing aspects in technologies and scientific background, and to create an open mind approach in science and technology to unlock the renewable energy and chemistry future.