why don't we use ocean water for producing energy?

Question

i mean burn water for example like we do oil

Answer 1

Because water is already burned. It started out as hydrogen. You can't burn something twice.

Answer 2

You can't "burn water" or otherwise get energy out of it--the chemistry doesn't work that way. There is work on using the tidal movement of ocean water to drive electricity-generating turbines--but that is still experiental.

Answer 3

Because water does not burn. That is why the fire department uses water and not oil to put out fires!

Answer 4

Cold Fusion!
It can't be done (yet). Cold fusion is about as close as I can make my head get to your idea of "burning" water. (water is burnt Hydrogen)
Ponds and Fleischmann thought they had achieved cold fusion, sometime in the 1990's. Their experiments couldn't be reproduced or proved.
http://en.wikipedia.org/wiki/Cold_fusion

We already have a few tidal energy generators.

Answer 5

You cannot "burn" water in the same way you would burn oil.

A much more viable approach would be to use wave stations to produce energy.

http://www.guardian.co.uk/renewable/Story/0,2763,719390,00.html

A proposed example is the Severn Barrage:

http://en.wikipedia.org/wiki/Severn_Barrage

Answer 6

Burning water...right, imagine trying to set fire to water...the fire would go out right?

Tidal power is already used, but if you have other ideas dont hesitate to contact the scientists.

Answer 7

There is the technology there, like using the low and high tides to turn generators but the cost is to high at the moment. As we speak there are researchers and engineers working on this to make it more practicable.

Answer 8

Water is not easily harnessed for energy purposes. It is a good idea whose time has not yet come.

Answer 9

Tidal energy is already used.

Answer 10

good idea