Grace Lunsford and her husband Corbett are in Carbondale today at the Rec Center from 11AM - 4PM on a nationwide Proof is Possible Tour, traveling in a high performance tiny house on wheels they call #TinyLab. They are a High Performance Power Couple, educating the public on home performance and energy efficiency. KDNK news director Gavin Dahl spoke with Grace Lunsford about why they do what they do.