It's uncertain. Despite what people say, main problem with hydrogen (when compared to other energy storage/sources) is not efficiency or safety, but overall co

It's uncertain. Despite what people say, main problem with hydrogen (when compared to other energy storage/sources) is not efficiency or safety, but overall cost. What drives the energy market is $/watt for a given solution, not raw efficiencies. That said, cheap hydrogen production is an active research area. Some ideas under research include hydrogen producing bacteria and analogs to photosynthesis. Some methods, even appear to be nearly perfectly efficient [1]. Now could hydrogen become a major source of power in 10 years? Probably not, as there are lots of costly problems to overcome - not just in production. Will it be in the distant future? Probably, given that it's the most abundant element in the universe, the power source of most stars, the easiest element to do fusion with - that it's hard to fathom us becoming a successful space faring civilization without it... https://www.eurekalert.org/pub_releases/2020-06/su-shp060220.php https://www.eurekalert.org/pub_releases/2020-06/su-shp060220... [1]