Hydrogen is rapidly becoming the#1 Poster Child as the replacement fuel for use in industry and heavy equipment where currently we depend primarily on diesel fuel as the energy source.  The biggest challenge is producing enough "Green" hydrogen to meet the demand.  Green H is made by using renewable electricity, primarily from wind and solar installations to split water into its component elements of Hydrogen and Oxygen.  Carbon is not involved in the process at all.

Currently, only 1% of H on the market is Green, but that is set to change dramatically over the next 5 years as pretty much every big player in the energy market is busy building Green H production facilities.  China, USA, Saudi Arabia, Russia, Sweden and many others all are building production facilities.  This is one of those situations where they very well may build so much capacity so fast there won't be enough machines yet operating using it that the market is oversupplied and the price will be forced down so nobody can make a profit on it.

Energy density compared to hydrocarbons is much lower, and the need to either compress it or cool it to liquid adds complexity, cost, space and weight, so in general you have shorter range and more refueling to do than with FFs.  However, with the exception of long range jet aircraft travel, it is a suitable replacement for FFs.

It will be interesting to see how much infrastructure can be put in place by 2030.  If they could achieve say 20% reduction in FFs replaced by Green Hydrogen by 2030, it's conceivable a full transition could be completed by 2050.  If so, the worst case scenarios of collapse might be avoided.

Iime will tell, but it's something we can keep track of over the near term to have a window to the longer term effect of fossil fuel depletion.  Use this thread to keep track of developments in Hydrogen energy.

https://oilprice.com/Energy/Energy-General/The-Race-for-Green-Hydrogen-Dominance-is-Heating-Up.html

The Race for Green Hydrogen Dominance is Heating Up

RE