Nebraska retiree uses earths's heat to grow oranges in snow
youtube.com
youtube.com
I guess its using the same principle as - https://www.lowtechmagazine.com/2020/04/fruit-trenches-culti...
Edit: Oh it seems to use underground pipes air is pumped through, neat
Will watch the video properly soon.
Does anyone know what the capital cost of the greenhouse at that size and the geothermal would be?
Quotes: $211 per lineal foot.
Further info is also in the description of the video:
> Finch sells a "Citrus in the Snow" report detailing his work with his "geo-air" greenhouses and says anyone can build a market-producing greenhouse for about $25,000 or "less than the cost of a heating system on a traditional greenhouse."