From David in Israel on Expedient Shelter/Greenhouses
James: I was looking over some of my old Mars proposals and wanted you to give a spin off to try in your colder area. This is an idea that popped into my head during my 105 minute bus ride as I thought about how most survivalists have no idea how to feed themselves or where they will live once they bug out. The idea is a double wall UV-transparent greenhouse with spacers between to make for good airspace insulation. Hydroponic tubing of a larger diameter would be connected to a curtained off outhouse toilet (and a runoff gutter rain …