[extropy-chat] A Grim Vision ...?

[ben]

"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,

LOL.

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?

ben zaiboc