RE:RE:RE:RE:RE:Earl ResourcesYou don't have to look as far as Canda. Salt Domes have already been put in use recently in Utah.
https://www.forbes.com/sites/mitsubishiheavyindustries/2020/03/13/in-utah-hydrogen-and-a-massive-salt-dome-are-winning-the-west-for-renewable-energy/?sh=12ec7ba85c52