The aviation industry faces a significant challenge in decarbonizing, where conventional batteries are too heavy for long-distance flights, and low-carbon biofuels have limitations. Zero-emission hydrogen emerges as a potential solution for reducing emissions in aviation. The whitepaper released by ARCHES, California's hydrogen hub, highlights the opportunities, challenges, and policy needs in utilizing hydrogen for aviation. The report, co-chaired by Berkeley Law’s Center for Law, Energy & the Environment (CLEE), provides key recommendations for state leaders to promote the adoption of hydrogen in aviation. The recommendations include developing standards and policy frameworks, expanding incentives through state agencies like the California Air Resources Board and Energy Commission, integrating aviation into clean transportation programs, enabling airport leadership, and fostering regional hydrogen clusters. These initiatives aim to address existing barriers such as high production costs, limited infrastructure, and safety standards. By leveraging the potential of hydrogen, California could establish a clean and resilient aviation system. While hydrogen may not immediately solve all climate challenges in aviation, collaborative efforts from policymakers, industry stakeholders, and airport authorities can pave the way for a sustainable aviation future. The whitepaper serves as a roadmap to accelerate the adoption of zero-emission hydrogen in California's aviation sector, aiming for a more eco-friendly and efficient aviation industry.