The article discusses the importance of energy efficiency and sustainability in green hydrogen production. It highlights the current energy loss in converting electricity to hydrogen and the available technologies to mitigate this loss, emphasizing a potential 1% increase in overall production efficiency. The Danfoss Impact paper underscores the necessity of efficient hydrogen production as it is forecasted to account for more than half of today's electricity demand by 2050. By focusing on sectors that are difficult to decarbonize, such as heavy industry and long-distance transport, green hydrogen can play a crucial role in the transition away from fossil fuels. The MENA region is highlighted for its renewable energy resources and its potential to lead the green hydrogen revolution. The article stresses the need for a nuanced approach to green hydrogen that optimizes production while reducing costs and energy demand. Recovery of excess heat from electrolysis is identified as a key energy efficiency measure with substantial potential, along with the importance of setting the right regulatory framework for large-scale hydrogen deployment. Key takeaways include the necessity of prioritizing green hydrogen for hard-to-decarbonize sectors, the significance of efficient production to minimize costs and energy loss, and the projected growth in global electrolysis capacity to meet climate goals. The article concludes by underlining the crucial role of hydrogen in the green transition and the importance of swift, cost-efficient production to achieve sustainability goals.