roughly speaking

you say that USA uses 100 times the energy of the incident sunlight?
thats ~ 1.3Kw per square M
so you say they are using .13megawatts per square meter?
a big generator is 200megawats
so they would need a big generator for every 1500 sqm?
and for the land surface of the USA thats 315328 terawatts?

"The total world power consumption is presently about 10 TW"

"one millionth of a gram (1 ?g) of mass to energy every second would release
approximately 90 megawatts [millions of watts] of power"

so we need 111111 ug/s to run earth
I might be off by a factor of 10 but i get 3.5 tones of mass converted to
energy per year.

pushing say 350 tonnes of mass from the moon to earth dosent cost that much
energy (solar power is handy on the moon)

anyway methinks that with sufficent motivation d/d fusion will happen mainly
because it has to.

-----Original Message-----
From: pic microcontroller discussion list
[mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of yajyaj
Sent: Tuesday, 18 November 2003 4:30 AM
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: [OT]: Willow tree biomass - multiplies input energy by 11


>Russell McMahon
>
>Without having read the materialism not sure what
>counts as "non renewable resources" but odds are
>lunar Helium 3 isn't on their list. Adding this,

You are missing the point Russell.  Any energy source on the moon might as
well be a billion light years away because we would expend more energy
retrieving it than we would ever recover by burning it.

Read this article: ENERGETIC LIMITS TO GROWTH
http://www.dieoff.com/page175.htm

It's an article I wrote for ENERGY MAGAZINE.  It explains net energy,
describes the results of the COR study, and more.

I have to go back to work.

Good luck,
Jay

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