The scale of the green hydrogen (GH2) opportunity emerging in North Africa is potentially transformative for the region. However, to date just one tiny pilot project is up and running and there is still no firm evidence that giga-scale projects can be made bankable. If the prospect is a mirage, it is one that has taken in a swathe of respected global investors. With an ever-increasing amount riding on the outcome, failure will be a disaster, but success could revolutionise the fortunes of the region, writes John Hamilton.