Life Cycle Assessment of Hydrogen Production Technologies: A Systematic Review of Environmental Impacts and Policy Implications for the Green Energy Transition
Hydrogen is not intrinsically low-carbon; its environmental value depends on how, where, and with which energy system it is produced. This PRISMA 2020 systematic review synthesizes 28 peer-reviewed life cycle assessment (LCA) studies on major hydrogen production pathways, including steam methane reforming, electrolysis...