Given the emphasis on technology in the book, this makes great sense. I expected a chapter on nuclear/volcanic/ meteoric "winter" gardening. Gertjan Meeuws of PlantLab (www.plantlab.nl/
) addresses this, while following on to Dickson Despommier's work in 2010 book "The Vertical Farm", to grow without sunlight much less tillage. Using blue and red L.E.D. lights and hydroponics his organization is raising a variety of flora. Bananas in the Netherlands!