John Roche Edit History Talk0 1,973pages on this wiki John Roche is a retired 3M employee who has dedicated his scientific knowledge to facilitating the adoption of solar cooking throughout the world. He is particularly knowledgable about plastic glazing materials. See alsoEdit Glazing ContactEdit jljroche@yahoo.com Read more Mike and Martha Port are the directors of the Solar Oven Society in Minnesota, USA. October... Mike and Martha Port Robert Nepper Barbara Knudson Categories: Individuals USA Minnesota Add category Cancel Save