cakeorwine · Today 08:25
And hydrogen is made from either fossil fuels or electricity. Hydrogen production can involve a lot of CO2 emissions.
Everything has a cost, obviously, but electricity can be generated by wind, solar, hydro etc. And all of them have ultimate environmental costs.
But coking is a really filthy process, I used live right across the Tyne from the Monkton coke works. After it was closed, the bioremediation operation of the site and surrounding area was absolutely massive.