Successful climate protection means switching from fossil fuels to renewable energies. Hydrogen plays a central role in the sustainable reorganisation of the energy supply. As a versatile energy carrier, it can be used across all sectors - from clean mobility and efficient electricity and heat supply to the storage of fluctuating renewable energies, as a basis for alternative fuels and as a process gas in industry. Hydrogen offers the opportunity to significantly reduce CO₂ emissions in energy, transport and industry and to slow down climate change.