Is THERE A WAY to efficiently extract hydrogen from h2o with electrolysis?

I think I know what your saying. You are talking about the supplemental hydrogen for car engines. It's not actually high cost of energy if it's for supplemental use only. I think they have used a higher output alternator that can produce a little bit more zap on your battery and on your electrolysis. And another is they are using some electrolysers to help boost the production of hydrogen. And for the straight up hydrogen as dangerous. I think anything that has the capacity to explode is dangerous. It's a matter of containing it. LPG is supposed to be dangerous, but human's found a way to in case it and use it to propel car's. Hydrogen as we all know is basically gas/air. So why not put it in an LPG tank and start from there? right? I more thing, we know that hydrogen will liquify in about -240 C and about 13 atmosphere's. Knowing that maybe some one with his genius will find a way to store it compress it and regulate it to boost our energy need's. One thing in mind. Are we not changing the ecosystem by using hydrogen? Water in our planet recycle water. Are we really certain that hydrogen after combustion is the same water we extracted it from when joined with oxygen? Or we are gradually decreasing the amount of water and someday empty the sea's? END OF THE WORLD! !

The problem is hydrogen has a much lower flashpoint than many other things like LPG or even gasoline vapor. It is also expoldes much more violently. I wasn't aware of the higher out put alternators though, that may be a bit of a help, as long as the engine doesn't have to work harder to turn the alternator. It's all about the race towrds zero point energy, in other words, you cannot produce more energy than you use, I believe it is the law of thermodynamics that describes that, not too sure, it's why a generator cannot run itself on it's own electricity. I have seen a lot of attempts to produce more energy than a device uses, but so far, the only thing that even comes close is fusion, and it isn't likely we'll be seeing fusion cars anythine soon, or even fusion power plants for that matter.

oh, almostforgot. I supose theoreticly, all the hydrogen we use would be returned as water to the environment with no ill effects. It is probably the most environmentaly friendly combustion process out there, if we could just find a way to safely and efficiantly harness it.

The damage in the environment is slightly slowing down now the fact that we are aware of it. Clean technology or green technology as other's may call it is trying to find to minimize the use of fossil fuels and thats it. They use solar systems, wind systems to reduce the power consumption using power plant generator's running on crude oil.