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Global Pathways to Hydrogen Energy Futures
註釋As with the evaluation of any emerging energy source, hydrogen-based energy also needs to be critically evaluated with respect to specific, real-world local, regional, national, and global issues (e.g., trade and transportation options, pricing criteria, production reliability and scale, certification of energy production sources and purity). Paramount among these issues is the establishment of trusted certification protocols to accurately characterize the purity, scale, and availability of hydrogen production (e.g., green versus blue versus gray).The potential incorporation of hydrogen energy into the global energy system requires a comprehensive review and critical assessment examining how to integrate different technological options, economic planning, and policy directions, while recognizing the diverse local, regional, and national priorities found worldwide. Significantly different geographic, transportation, infrastructure, economic, political, and cultural conditions routinely define the practical options for hydrogen energy production, distribution, and usage. Attention to public endorsement and acceptance remains a critical issue to be considered.