Besides losing nearly a billion euros last year, it accounts for nearly 3% of Germany's C 02 emissions.

Tackling that will test Berlin's green resolve first to some, crab would need to refit it's blast furnaces.

These used coal to turn iron or into iron.

And unfortunately, co two replacements would be electric arc furnaces that use hydrogen to do the chemical heavy lifting.

The only by product is water, but that switch could cost more than €7 billion.

And then there's the problem of power to be truly green.

The hydrogen has to come from water split via electrolysis and with the electricity coming from renewable sources.

And it's a lot of electricity based on McKinsey.

Estimates in one year to some crew were consumed more than the quarter off Britain's entire wind energy output.

But that doesn't mean it's impossible.

Germany has to do something about co two emissions.

Berlin is already throwing €9 billion.

Hydrogen research, as technology improves on carbon taxes, make traditional steel more expensive.