The vast majority of hydrogen on earth is locked into water. While splitting water and then recombining it can be done, and is in some forms can be thought of as a battery, it has long been postulated, that there might be hydrogen deposits in the earths crust. Not considered valuable until recently, few were looking for hydrogen.
This has changed dramatically, and after writing several months ago about a find in the USA, another has been made in South Australia. This find has 95.8% pure hydrogen, greatly reducing the purifying costs (the same company has also found deposits of helium at 17.5% pure).
This hydrogen should not be used for passenger cars, but instead in applications where nothing else can do (like air travel) . Even shipping, currently highly polluting, does not need to be. A mixture of kite sailing, new retractable sails of various kinds, and even electric motors with batteries, means that shipping should be able to rapidly decarbonize over the next few decades. This hydrogen must be used carefully – while these deposits might be large, they are not endless. As such, we want to use this for uses which cannot use batteries.