What condition makes hydrogen derived from splitting water considered 'green hydrogen'?

Answer

When the electrolysis is powered by renewable sources such as solar or wind energy.

The 'green' designation applies only when the energy used to split the water comes from renewable sources, meaning the water acts as a storage medium for captured solar or wind energy.

What condition makes hydrogen derived from splitting water considered 'green hydrogen'?
Chemistrywaterenergyfuelreaction