looking_for_helpers t1_iudve78 wrote
Reply to comment by Shamino79 in Indoor agriculture has sustainable potential to feed Canada, others, year round: experts by pirate_republic
Because you can't grow outside when it's - 20C
And water conservation
Shamino79 t1_iuf6bsv wrote
People have heated greenhouses in northern climates. They still make use if the sun.
looking_for_helpers t1_iuf7r6v wrote
There are more variables involved, such as very short days with the sun low on the horizon, the ability to run 24/7, the heat loss costs, security, abundance of cheap clean hydro-electricity, and a hundred other variables. Sunlight is one of them, and we can eliminate that as a production - limiting input.
The Canadian government used to grow weed in an old underground mine.
Shamino79 t1_iuf999s wrote
Weed used to get grown underground so no one could see it and was under lock and key. Don’t need that for lettuce and tomato. And I do get that greenhouses can use supplementary lights, insulation and heating to extend a season or control flowering. Taking it into a fully sealed building feels like it’s crossed a tipping point. Seems to me at some point food preservation and transport of canned goods could still be a good alternative.
looking_for_helpers t1_iufemoe wrote
There is not a single solution for all use cases, like energy sources, there are many.
flash-tractor t1_iug1mn8 wrote
Speaking from experience- it takes more energy to maintain a greenhouse than a well insulated building.
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