The article discusses the critical importance of accurately measuring emissions from hydrogen production to ensure its role as a clean energy source in various sectors. It focuses on the U.S. Department of the Treasury's draft rules for the 45V tax credit, highlighting the need for a standardized system to verify carbon intensity and promote low-carbon hydrogen projects. The current national average emissions evaluation method could lead to misallocation of tax credits, potentially hindering progress in reducing greenhouse gas emissions. To incentivize investment in clean hydrogen production, the article suggests implementing a harmonized methodology to assess carbon intensity at the facility level. This approach aims to reward companies excelling in low-carbon production and foster innovation by lowering production costs. By adopting a standardized lifecycle analysis, the 45V tax credit can encourage cleaner hydrogen production processes, driving industry competitiveness and environmental integrity. Moreover, the article emphasizes the significance of inclusive dialogues involving policymakers, industry leaders, and environmental groups to develop effective measures for long-term market growth. Drawing parallels with electrifying vehicle fleets, it suggests that collaborative engagement can facilitate industry-wide transformation and drive the hydrogen sector toward widespread adoption. By fostering diverse perspectives and collaboration, policymakers can craft incentives that promote decarbonization without impeding industry growth. In conclusion, the article advocates for a pragmatic and forward-thinking policy to support the hydrogen sector's growth and its pivotal role in a sustainable energy future. It underlines the necessity of a standardized emissions accounting system as the foundation of a clean hydrogen market, essential for achieving climate goals and advancing environmental objectives while balancing economic considerations.