I wrote:

> I'll bet wind could supply half the world's energy, especially in countries far from the equator. It could
> easily supply all energy in the U.S. and Northern Europe, and most in northern China.

And for that matter, I think ocean currents such as the Gulf Stream could supply way more energy than we consume. But it might not be such a hot idea to tap them on a huge scale.

Here is a company that wants to tap them on a modest scale, up to a few thousand megawatts:

http://www.bluenergy.com/technology.html

- Jed

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