From: "Geo" 

"Monte Davis"  wrote in message
news:3478p19ht8k5ojh0fvhbs8in2bd2dtai8a{at}4ax.com...

> >Converting heat into usable energy usually just requires a way to
> >concentrate or focus the heat..
> >
> And you can't do that without rejecting heat to the environment.

That depends on what you do with the heat. Ever notice how on a clear
winter night it gets really really cold?

Geo.

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