Global warming: Does it take MORE energy to create hydrogen than PROVIDED in hydrogen fuel cell cars?

The round trip is a net loss isn't it? We use electricity to convert H2O into H and O.

Then in a hydrogen fuel cell car, we RE-convert the H and O back into H2O again.

So it is a round trip.

But since every mechanical device LOSES energy through friction and heat and waste, the round trip from H2O to H & O and back to H2O LOSES energy.

Isn't this right? So how will a hydrogen economy run the country or replace oil-burning cars?

Could a person use a device that splits water like for hydrogen fuel cell car but keep oxygen for scuba diving?

I heard that this canadian invented a device that splits water into hydrogen and oxygen. Companies use this device to store hydrogen in tanks until it can be used for a hydrogen fuel cell car(like they do in iceland). My question is can you store the Oxygen instead to go on the ultimate scuba adventure? My dads a scientist, but we’re not talking right now so I thought I would ask here.

does anyone know anything about when the Honda hydrogen fuel cell will be available to the masses?

trying to save $ for a Prius, but i figure by the time i have money for that the Honda Hydrogen Fuel Cell will, hopefully, be open to the public. pretty much, by the time i save up for the Prius, the new Honda hydro. cell should be ready for release. does anyone know when it will be ready for the full public to use? any info that isn't already on the site? i'd like to learn more about this car.

Why does my water in my hydrogen fuel cell turn to a weird color?

When I turn on my hydrogen fuel cell or HHO fuel cell and it runs for a little bit, the water starts to turn like yellowish brownish. And it starts to form bubbles on the top of the water that turn really dark brown or black. What kind of water do I need to use and if I need to mix something in with the water, what is it?
Thanks Dave I didn't want to mention that i was using tap water because I wanted to see if someone would state that could be the problem, but when i use distilled water do I need to mix anything in with it. Or can I for better results?

How much Hydrogen is needed to react in a Hydrogen fuel cell?

So, my question is if anyone knows or can point me to a link is, how much compressed hydrogen is needed to react with a fuel cell to produce enough electrical power to at least equal the amount of drivable distance as a modern gasoline powered car? I can understand that no one may know this as a result of industry secrets and what not, but ill take anything.

Which route will give the auto industry its best chance of survival?

The U.S. auto industry is in turmoil, it has spent too many years building inefficient vehicles. Which route will give the auto industry its best chance of survival as the gasoline supply starts to dry up: hybrids, natural gas, hydrogen, fuel cells, electric, steam ? Explain your answer.

Why do US major auto makers not implement hydrogen fuel cell cars across the country along with fuel stations?

Regular Americans cant afford Hydrogen fuel cell cars on their own and the only place that has it CA, they have every thing there. Well what about the rest of us. Regular Gas Mileage doesn't do crap its still polluting the earth and killing off the best natural resource known to man EVER hydrogen would solve so much pollution problems. Hydrogen has been proven save, yes it will cost billions of dollars but even in this so called recession the huge companies have billions if not trillions stocked away i mean really how many numbers do they need in their bank statements to feel like "rel men" WTF im happy with 20 bucks and something to eat. It is the only way its going to happen is if the govt and major car makers put up hydrogen fuel stations and sell them nation wide and hopefully world wide. Imagine the billions of metric tons of CO2 per year no longer in our air, the world is at an all time low of O2 content ever in recorded history. Just something to think about, and if any automakers happen to read this just imagine how insanely rich you would be if you are the first company to go nation wide with this hydrogen plan. Sounds like a winner to me 🙂