I think this has come up on HN before, but Low Tech Magazine has a great piece about citrus production in the Soviet Union: https://solar.lowtechmagazine.com/20

I think this has come up on HN before, but Low Tech Magazine has a great piece about citrus production in the Soviet Union: https://solar.lowtechmagazine.com/2020/04/fruit-trenches-cultivating-subtropical-plants-in-freezing-temperatures.html https://solar.lowtechmagazine.com/2020/04/fruit-trenches-cul...