“We have to learn to love blue hydrogen. Maybe in an ideal world, we wouldn’t, but we do,” said the influential independent analyst Michael Liebreich last week. Liebreich, who founded renewables analyst group New Energy Finance (now BloombergNEF) in 2004, said in an online interview that just replacing all the grey hydrogen being used today — and meeting the coming demand from sectors that “would almost certainly” need clean H2 to decarbonise, such as steel, shipping and long-term energy storage — would require five times the current installed global wind and solar capacity. “And then you have to do that at the same time as decarbonising everything else — all of the land transportation, all of the electric vehicles, all of the electric heating you want to do, all of that stuff would need to be on top of that. “So we are not, in the next two decades, going to…