[Trusties] Global Material Cycling entry in Encyclopedia Earth

[Sean Seefried]

On 24/08/2008, at 9:32 PM, Tim Winton wrote:

> http://www.precaution.org/lib/global_material_cycles.070601.pdf
>
> This comprehensive entry on global materials cycling and human  
> interference in the same involves two very important figures in the  
> domain of energy and sustainability: Vaclav Smil (energy) and Cutler  
> J. Cleveland (energy and ecological economics- if I am not mistaken  
> he was a student of Howard T Odum). Well worth reading.

 From the paper:

"slightly more than one-third of the solar energy absorbed by the  
earth's surface and the planet's atmosphere
(but 4000 times the amount of annual commercial energy uses), is  
needed to drive the global water cycle."

Yet another reason why we can't have all of that abundant solar energy  
that is out there for us to potentially tap in a solar economy.

Also, fits bloody close to my calculation that commercial energy uses  
are 1/12000 of what the sun gives us. If one third equals 4000 times  
commercial energy use then one whole equals 12000 times commercial  
energy use.

Sean




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> Tim Winton
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