Today, hydrogen is mainly used as a chemical in industry for oil refining and fertilizer production, but it has the potential to be another player in the clean energy innovation game. Like electricity, hydrogen is a carrier for energy from any source to virtually any end use, and it is made in a variety of ways that are usually simplified into colors. The smallest element on the periodic table could unlock some of the biggest energy challenges — electricity grid resilience, energy storage, and industrial decarbonization.