On Fri, 24 Nov 2006 11:04:00 -0700, Lynnet Bannion <[log in to unmask]> 
wrote:

...
>If the supply of petroleum energy was truly infinite, maybe we wouldn't
>care (except for the pollution and climate change).  But it really isn't
>infinite.  Not even nuclear energy (on earth, that is) is infinite; ...

>This is going slightly off-topic here, 

Thanks for the input, Lynnet. I still don't quite understand the 
comparison of energy and food calories. It's an interesting topic, but as 
you suggest, this is probably better suited to a separate thread.