Well there's "blue hydrogen" and "brown hydrogen" which are produced from natural gas and coal respectively.

Green hydrogen is produced through electrolysis, from renewable energy sources like hydro, wind and solar.

> Green hydrogen is produced through electrolysis, from renewable energy sources like hydro, wind and solar.

Terminology correction: From low-carbon energy sources, like wind, solar, nuclear and hydro.

https://en.wikipedia.org/wiki/Green_hydrogen

This particular steel is made to be 100% CO2 neutral (as is all hydrogen in Sweden). Very much most likely made from hydro power (accounts for about 40% of power generation in Sweden - and the owner of most hydro in Sweden, "Waterfall", which is state owned, is a partner in the project) of from wind. Both energy sources is very common in the north of Sweden.

> CO2 neutral (as is all hydrogen in Sweden). Very much most likely made from hydro power

Now that you put them together like this, I noticed this will probably confuse a lot of people in years to come: hydro power is a very different thing from hydrogen power.

Green hydrogen isn't; the thing you're thinking of isn't called green hydrogen.