The economic development organisations of the northern German states of Bremen, Hamburg, Mecklenburg-Vorpommern, Niedersachsen and Schleswig-Holstein have joined forces to form the green hydrogen alliance HY-5. The initiative, promoting the states as an economic stronghold, aims to make Northern Germany the leading future region for green hydrogen in Europe and to complete the value chain for green hydrogen. Together, the federal states want to contribute to establishing Northern Germany as a hydrogen region.