[ianburrell]

It is weird that proposes floating platforms where there are plenty of volcanoes on land that could be tapped. Much easier than going through miles of ocean before drilling. Also, land can be connected to the grid; they could run cables from Iceland to Europe.

Making low carbon synthetic fuels is talked about a lot here and elsewhere. The main problem is that it is more expensive than hydrogen. But lets you use existing vehicles but with much larger fuel costs.