In article >, Andy <q> wrote:

>Steve Pope said...

>> I'm not aware that vertical farming ever involves artificial
>> light. Instead, the man-made vertical structure intersects
>> sunlight that would otherwise fall upon non-farming land,
>> like a business or residential district, taking advantage
>> of the fact that most sunlight is coming in at an angle
>> rather than from straight above.

>It still can't work. Each succeeding lower floor would get less and less
>sunlight, yielding less and less. Even if the building rotated, the "inner
>sanctum" of each floor wouldn't see direct sunlight.

All this implies is that the vertical spacing from floor to
floor must be large compared to the width of the floor.

>Artificial sunlight would be the only feasible way to do a city block 10
>acre/10 story building. No other way to do it.

I completely disagree. Why would you need to build a tall building
(as opposed to a flat one) if you're simply piping in
electricity for lighting? The whole purpouse of a vertical
arangement is to intersect a large segment of sunlight
for a given footprint, thus justifying the construction cost
of a tall structure.


Steve