250,000 Tiny Greenhouses, Each Containing One Head of Lettuce

The homefront during the world wars is a great place to look for strange technology and new social practices.
So, permit me a brief digression from green tech into the gender-bending agricultural and industrial story of Britain during the war told in the pages of the aforementioned 1918 National Geographics.
Judson Welliver tells us, “Everybody knows how [...]