Just two nights ago, when I was reading the gospel here, there was a post about Toyota having developed a water-based engine that would endanger the EV market.
A few hours later, it was scrubbed from the internet. Not even the Internet Archive site had a copy.
I thought all this tech was going to come out soon under Trump. This couldn't have been deemed too disruptive to society.
Separates the hydrogen from the oxygen by using more energy than the combustion can produce? That would be a perpetual power generation machine. Just condense the combustion products and pour them back into the water tank. It's magic!