Home of the psp method for building underground earth sheltered and earth bermed housing shelters and greenhouses. Construction techniques that can be used for passive solar homes stick sips strawbale underground . Mike oehlers underground greenhouse design mike digs a deep trench for access on the shaded south side which also allows cold air to sink and be warmed . This doesnt mean we should allow the continued proliferation of nuclear reactors and weapons unless we want to eventually move underground but while we . Our mission the natural building blog is committed to providing free information that will improve peoples lives in a sustainable and affordable manner
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