The European Marine Energy Centre (EMEC) has produced hydrogen gas using electricity generated from tidal energy in Orkney since 2017 - a world first at the time. The Scottish islands now use hydrogen in cars, ferries and a range of other activities.
"We have the lowest energy costs in a zero emissions world and it becomes an advantage in processing Australian minerals. That can become a huge industry.We also have big advantages in our huge areas of land for capturing carbon in plants, in the soil, exporting carbon credits, growing biomass for industry because we won't be making plastics and petrochemicals out of oil, gas and coal, we'll be making them out of biomass and if we get our act together we can do that more cheaply than others."...https://www.abc.net.au/7.30/what-will-the-post-covid-economy-look-like/13194362