OpinionLearning the hard way: Energy giants leap forward with transition, but could have been swifterBP and Shell backed away from early green energy efforts years ago, but are now pressing ahead with hydrogen, renewables and carbon capture plansHydrogen ambitions: Shell has launched a hydrogen electrolysis plant called 'Refhyne' and will produce green fuels within a European Union-funded consortiumPhoto: AFP/SCANPIXEditorial