[Greenbuilding] Growing food by electeric light - urban sustainability?

[Corwyn]

On 6/11/2012 6:36 AM, Alan Abrams wrote:
> <Quick back-of-the-envelope calculation:
>
> Plants convert about 2% of the energy they receive into stored energy
> that we can digest.  Lettuce, for example, could have 80 calories per
> pound.  Or 93 watt-hours.  Which would require 4.65 kWh of electricity.
>
> Trucking lettuce on the other hand, (according to Elliot Coleman) takes
> about 1.18 kWh per pound from California to Maine.>
>
>
> Yes, but there's more to nutrition than calories...

Sure there is.  But I am not sure how that affects the question of 
whether to grow food inside under lights, or not.  Do you have some 
insights on that question?

Thank You Kindly,

Corwyn

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Topher Belknap
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