The article discusses the challenges and strategies associated with scaling green hydrogen production to achieve decarbonization in sectors that are difficult to electrify. Policymakers worldwide have set ambitious targets, with countries like the EU and the US aiming to produce significant amounts of renewable hydrogen by 2030 and beyond. However, industry experts, like Prof. Emmanouil Kakaras, caution that the projected targets may be challenging to meet due to infrastructure limitations and time constraints. One of the key challenges highlighted is the high cost of green hydrogen compared to conventional "gray" hydrogen. Lowering the cost is crucial for the sector's development and attracting necessary investments. Additionally, derisking investments is essential to encourage investor participation, with a need for clarity on subsidies and project viability assessments. Policy support is identified as a critical factor for sustainable hydrogen production. There is a call for policymakers to create incentives for demand in hard-to-abate sectors like steelmaking and petrochemicals, where hydrogen can play a significant role in decarbonization. Prof. Kakaras emphasizes the importance of proper policy frameworks and incentives to drive widespread adoption of green hydrogen. In conclusion, while the potential of green hydrogen is recognized for decarbonization, addressing challenges such as cost, investment risks, and policy frameworks will be crucial in scaling up production. Strategies to drive down costs, derisk investments, and stimulate demand creation in challenging industries are essential for the successful transition to a hydrogen-based economy.