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.
I also played with HHO or Browns Gas about 20 years ago. I built an electrolysis cell that generated 5 liters/min. Then used it as a fuel additive in a ICE with the intention of weaning it off the gas completely. And then planned to move up to a simple 4 cylinder. My problems had more to do with tweaking timing and burning valves since HHO burns much hotter and faster than gas. I absolutely knew it could be done, but it would take a company like Toyota or Honda to make it happen.
Also, if you can power a car with water, then you could power a generator for a house. Or a city, or country, or the world, with No emissions. Hence the problem...