From: [email protected]
[mailto:[email protected]] On Behalf Of John Clark
Sent: Friday, February 28, 2014 10:34 AM
To: [email protected]
Subject: Re: The situation at Fukushima appears to be deteriorating
On Thu, Feb 27, 2014 at 6:42 PM, LizR <[email protected]> wrote:
>>> Why bother with all these other power sources when you have a fusion
reactor in the astronomical backyard?
>> Because the energy density decreases with the square of the distance and
the fusion reactor is 93 million miles away, and because the energy drops to
zero for at least half the time.
> It still delivers thousands of times more energy to earth than human
civilisation uses.
>>Yes but economically the total amount of energy, or of anything else for
that matter, is not important, the important thing is the amount per unit
volume. Only 174,000 tons of gold has been mined in all of human history and
right now in seawater there is 69 thousand times as much, 12 billion tons.
And yet nobody bothers to extract gold from seawater because the
concentration is so dilute (about 5 parts in a trillion) that it would not
be economical to do so.
But plenty of people are bothering to extract electrons from the photons.
diffuse as they may be. 40 to 50 gigawatts are being added just this year.
At some point don't the facts on the ground begin to speak for themselves?
Chris
John K Clark
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