Other amount rokettube The Mortensons have spent the last 30 years living in an underground house they built themselves over an eight-year span. During the oil embargo in the 1970s, the Mortensons and the rest of the country were struggling with the high price of fuel and looking for ways to cut usage. Then Mortenson saw a magazine article that talked about underground living and the low cost of heating and cooling costs and they were intrigued.
