We’ve seen several videos like this, a setup resembling a stomach distress remedy fizzing away and giving off bubbles of hydrogen and oxygen. Dr. Daniel Nocera first created the idea of an artificial leaf, and several others have followed his lead and refined the process, which mimics nature’s leaves in converting sunlight to energy. The U. S. Department of energy’s (DOE’s) Energy Innovation Hub, established at Caltech (California Institute of Technology) and its partnering institutions, has a main goal of creating “a cost-effective method of producing fuels using only sunlight, water, and carbon dioxide.” Artificial photosynthesis has been tried in several variants, but researchers at Caltech and its Joint Center for Artificial Photosynthesis (JCAP) now claim to have developed “the first complete, efficient, safe, integrated solar-driven system for splitting water to create hydrogen fuels.” Nate Lewis, the George L. Argyros Professor, professor of chemistry, and the JCAP scientific director, takes pride in his group’s accomplishment. “This result was a stretch project milestone …