H2-diplo is an initiative of the Federal Foreign Office to support the German Federal Government’s energy and climate foreign policy. In order to limit global warming to 1.5°C, greenhouse gas emissions must be reduced. This requires a move away from fossil fuels such as crude oil, natural gas or coal. H2-diplo is working together with partner countries on ways to use green hydrogen to decarbonise and diversify their economies. Green hydrogen produced from renewable energies can play a key role in decarbonising so-called hard-to-abate sectors, such as the production of chemicals or steel. In addition, H2-diplo addresses geopolitical questions surrounding the international market ramp-up of green hydrogen, such as shifting balances of power on the path to a climate-neutral global economy.