The International Renewable Energy Agency (IRENA) has released a guide on policy making for green hydrogen supply. The report highlights the importance of international cooperation and the role of IRENA as a platform for knowledge exchange and action on the ground. The guide covers various aspects of green hydrogen, including policy, technology, resources, and finance. It also emphasizes the importance of sustainable development, energy access, energy security, and low-carbon economic growth. The report was authored by Emanuele Bianco, Diala Hawila, and Herib Blanco, with input from IRENA colleagues and technical support from the Polytechnic University of Turin.