Reprints + - In this Aug. 14, 2015 photo, Rob Dunn sits on the porch of his two-story, 96-square-foot home in Poultney, Vt. Dunn, a Green Mountain College senior from Henniker, N.H., has lived off the grid for about a year in his tiny home powered by two 100-watt solar panels. He uses a rocket mass heater for cooking and heating....
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