Paula and Bill Lishman spent many winters in a poorly-insulated A frame cabin before realizing they needed to go underground to use the earth’s energy to stay warm, so they knocked the top off a hill, dropped in ferro-cement domes and covered it up again with dirt.
You might remember Bill Lishman from the work he did with Canada Geese in the mid-80s. He trained the birds to follow his ultralight aircraft to teach them migration routes to avoid a threatened extinction. Operation Migration brought him popular recognition with the 1996 movie Fly Away Home starring Jeff Daniels.
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