Light green hydrogen will do

Whether sustainably produced hydrogen needs to be 100 percent green is currently under debate. Using the production of ammonia and artificial fertiliser as examples, researchers have calculated that "nearly sustainable" hydrogen would be better in the end.

Hydrogen production facility adjacent to a hydropower plant
In April 2024, the electricity company Axpo opened a hydrogen production facility adjacent to a hydropower plant in the Swiss canton of Graubünden. A large-scale ammonia plant would require a much bigger facility. (Photograph: Keystone-SDA / Gian Ehrenzeller)

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