Renewable electrolytic hydrogen, produced from wind and solar sources, has been identified as most beneficial for decarbonizing hard-to-electrify industries such as steelmaking, transoceanic shipping, and heavy-duty trucking. A study by UC Irvine researchers shows that transitioning to clean energy in these sectors can significantly reduce climate damage, improve air quality, and enhance human health. Policymakers and industry leaders can utilize this data-driven framework to prioritize hydrogen investments for maximum public benefit. Despite barriers such as high production costs, energy requirements, and limited supply, the potential of renewable hydrogen to decarbonize these sectors remains promising. This study underscores the importance of renewable hydrogen in addressing the challenges of climate change in hard-to-electrify industries and transportation.