Over four years, UNH professor Tom Haines explored - on foot - the landscape of energy consumption in the US, from oil rigs, gas pipelines and coal fields to solar and wind farms and new technologies. We talk with Haines about his book, Walking to the Sun, about his pilgrimage, the folks he met along the way, and the path forward in the face of a growing climate crisis. GUEST : Tom Haines - Author of "Walking to the Sun" and Associate Professor of Journalism at UNH. He was formerly the staff travel writer at the Boston Globe.