It is pretty fascinating to see CO2 Emissions from Bremen, seeing that our steel production is about 58% of total of our city.
That means, no, there is no way around it than to improve there.
Going all Hydrogen would require ca 1.5GW of Electrolysis capacity, best case only 800 MW.
Europe has about 230 MW as I learned Tuesday.
Furnaces need to be renewed every so many decades. We have the window NOW. Arcelor Mittal operates two Blast Furnaces here.