by 
anonymous
ANSWERS: 7
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no because it cause just as much damage to make the batteries that power them and they have to be replaced a lot.
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can't see how ,,when there are lots of other cars that do more miles to the gallon,,and use a lot less pollutants making them,,,
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Not as much of a reduction as fuel cell vehicles powered with hydrogen made by electrolysis. Fuel cell vehicles can be made more powerful too. Please see: http://automobiles.honda.com/fcx-clarity/?from=fcx.honda.com and http://en.wikipedia.org/wiki/Electrolysis_of_water
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Minimal to nothing. This needs to be a global effort and it is not. And who's watching the oceans? That is where 95% - 97% of the co2/o exchange occurs anyway.
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Yes, with a big BUT. Yes, but the cost hugely outweighs any benefit. (Watch user "Admin" come along to say lots of stupid things, without ANY facts to back him up.)
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Nope, too many moving parts, too complex. What we really need is a viable fuel cell vehicle. As a step in the experiment, they are a learning tool for those that can afford them. Until we can find a fuel cell that runs on hydrogen and works at normal temperatures, the best we can do is an all battery short range vehicle or a diesel electric hybrid. These vehicles are only a step in the development of a vehicle that disassociates water to create it's own fuel.
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Partial at most. The technology is also still in it's infancy, take a look back in thirty or even ten years. +5
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