[extropy-chat] A Grim Vision ...?
benboc at lineone.net
Mon Apr 16 20:10:15 UTC 2007
"Robert Bradbury" <robert.bradbury at gmail.com> wrote:
> On 4/15/07, Keith Henson <hkhenson at rogers.com> wrote:
> > You *can't* grow food in a "relatively sealed greenhouse." Think
> > about it.
> Ok, yes, one has the problem of adding the CO2, releasing the O2 and
> retaining the H2O,
Yes, and removing the food.
What's 'sealed' about a system that has to have stuff going in one end
and stuff coming out the other?
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