22. Hydrogen made with renewables will be used to make steel and fertiliser. Some may be used to make shipping and aviation fuel. Some may even be burned for power in weeks of low renewables, which is one way to shift energy from summer to winter.
23. ...but sometimes net-zero electricity models want to use hydrogen to cover weeks of low renewables just because the model isn’t given any other option. Deep decarbonization models do weird things. There may be easier pathways in practice.