GLOSSARY

Hydrogen as energy: production, uses and conditions for decarbonisation

Hydrogen inspires major ambitions in industry and energy, but it is not a primary source abundantly available in pure form. It must be produced from water, natural gas or other feedstocks, then stored and transported. Its climate value therefore depends on the energy consumed, manufacturing emissions and intended use. In 2025, low-emissions hydrogen still accounted for less than 1% of global production.

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