Underground grow room realistic?
Hi, I'm in Iraq and some guy I was posted in a tower with told me this story about a friend of his having an old train car basically buried in his back yard with the whole inner surface lined with mirrors and a few stepping stones to walk on and a one foot by one foot window in the top to supply all the light necessary. Also, he said that since it was underground, the temperature was comfortable in the summer and frost safe in the winter.Does anyone have any experience with this? Is he full of it?, I mean would the window really supply enough light with the mirrors and wouldn't you need some ventilation to let in carbon dioxide and avoid mold problems. This garden was supposedly designed originally to be his nuclear self sufficient bunker thing or something and once he saw how well his illicit species did and he didn't get nuked, he turned over completely to that. I'd like to have a year round vegetable garden without all the headaches of a greenhouse but this sounds like a fairytale to me. What do ya'll think?