Im not sure, but doesnt hydrogen-fueled cars cause much more global warming because of the H20 they pure into the atmosphere? I think its at least comparible to the gasoline driven cars. And global warming is becoming our biggest threat.

Pesi: No, the exhalation from hydro cars causes no pollution what so ever, the exhaust is pure H2O steam... if the H2 however leaks unused, it causes some pollution.

Global warming isn´t a "threat" at all. But you probably won´t believe it because you've been "programmed" not to.

What about the motorcycles? and tractors and all that other motor stuff?

I totally agree that global warming isn't a threat at all. I'm sick of liberal publications brainwashing people of the world to believe that a natural process such as global warming is a horror. It is an inevitable thing, and there are much more urgent topics than global warming.

On a related note, it is a travesty that Al Gore was presented with the Nobel Peace Prize. He most certainly isn't of the ranks of Mother Teresa and Martin Luther King, Jr.

Global Warming is naturally happening now yes, and we can't do much about it, but still we need to be very cautious and change our ways! All the CO2 does warm up the atmosphere! That's why Venus is 900 degrees and Mars has near-earth temps with 1/1000th the atmosphere! Also, many fine particles and soot is causing lung cancers and asthma increase worldwide.

To make hydrogen you need electricity. So unless you have a renewable source of electricity you cant produce hydrogen. Why not use the electricity straight away.

Pesi, how would too much water be bad for the atmosphere, i mean it is so much better to have water instead of CO2. wouldnt you think?

Ok to the person who said Hydrogen emits no pollution, you're right. Technically, the exhaust is actually cleaner than the intake. However, if you do some background researching, you will find that CO2 is less of a global climate threat than H20 water vapor. Water vapor traps in much more heat and sunlight that CO2- its a bigger problem.

Well, I believe that this could be interesting. The fact that Iceland is making this manadatory for the country is neat. They have 100% vs the U.S. 10%. Maybe it's time the U.S. forgets its pride and take a lesson from other countries. I don't think it would be that hard with a little planning, research, promoting the idea, and some confidence this could be the future. Global warming is real so we need to do something about it now or it will be too late. So, I feel that the U.S. really needs to look at what other countries are doing and not care about pride. It's time the U.S. had a rude awakening and a good lesson at the same time.

Haven't the car companies abandoned the idea of hydrogen cars because of storage issues. There is an issue of physics and hydrogen storage. Presently there is not a reliable means to compress hydrogen down to a volume that is manageable and the energy capacity to power a vehicle for any significant distance.

Dear Sir,

We can't just wait till 2040. That is awful long time. We do need to develop alternative fuel supply now. Why do we spend billions of dollars in sports related events and not paying good attention to our energy sources such as sunlight, windpower etc. Why don't we set-up solar collector up in the sky and beam it down via radio frency. This kind of projects should be started before late. If we are to explore universe,. we do need lots of energy and this seems to be the best source. Lets get all our scientists and engineers to strat act on this project.

Thank you

I’d never thought there’s already a hydrogen cars on year 2003 especially in Reykjavik. Using hydrogen cars is very practical and economical.

to dj: didnt they say similar things about gasoline? just because we cant do it now doesnt mean our rather primitive hydrogen tech will stay around forever. but who knows? it just might stay as it is now, and will probably be forgotten and looked down upon by future people who have discovered a much more feasible fuel source. but, then again, why are we spending so much time and money on finding an alt fuel for our cars? couldnt we be doing more important things, like medical breakthroughs and cures for cancer? why dont we improve mass transit or live in ped-friendly cities? but oh well look at me babbling on XD

I don't see hydrogen replacing any fuels except in those instances where electric is not practical or possible, as in larger boats and commercial fleets.

Nuclear power will be used mostly by the militaries, but also in larger ocean going vessels.

The few airlines left will use some blend of bio-fuels but that will be too expensive to waste in personal vehicles or for casual travel, except by the wealthy.

I would like to comment that, No-one alive today has ever lived in a world with-out cheap petroleum. There are many wild ideas to preserve our wasteful life-styles and to continue on as before, but, they are not realistic. Personal vehicles, jetting to grandmas across the continent for holidays, heating your homes with cheap natural gas or oil is history. Even if we have not hit Peak Oil ( and many think we have) it will happen soon. Please keep in mind: ALL of the proposals for replacements for oil are:
1. Expensive to implement. ( We are talking Trillions of dollars NOW!)
2. Require a huge amount of energy to implement. (The construction of just one windmill takes huge amounts of energy, and we need hundreds of thousands of them)
3. Bio-fuels are limited because they take food product for fuel production. ( There is not enough farm land in the WORLD to even provide the fuel the US consumes.)
4. Resource Wars are going to slow everything down over the next 20-30 years.
5. Time is against us, and the clock is ticking.

It took 150 years to go from non-oil to today. It will take an equal amount of time to move to the next level because there is no fast, easy, cheap energy source out there, as we will all see over the next 30 years.

Oh my God, where do y'all get your information?
Water vapors (aka clouds) are white and reflect light (aka heat) so they have a cooling effect.
Water vapors do not trap heat better than anything, water is one of the worst conductors ever, that's why lakes are cold well into the day after the land has heated up, why do you think areas with water are so windy? (hot air over a cold body)
there are already hydrogen cars, youtune has videos, lots from BMW.
Global warming isn't disputed, the Earth is getting hotter and colder without our help, but global warming refers to the build up of particles in our atmosphere insulating us like a green house, this concept is easier to prove than the fact that the world is round. (walk into a green house)
Global warming is natural in the since that it has happened due to meteor strike and volcanic activity in the past, but not natural in the since of being good for us.
read a book idiots (not the Bible)

Thanks Tard! Finally someone with a bit of common sense.

in califonia they have an experimental hydrogen bike link so how come the us would only be 10% converted.