Start a Fire With a Cup of Coffee By GREENPOWERSCIENCE in OutsideCamping1,60381DownloadFavoriteIntroduction: Start a Fire With a Cup of CoffeeBy GREENPOWERSCIENCEGREENPOWERSCIENCEFollow More by the author: About: You may recognize Dan and Denise Rojas from their appearances in various made for tv movies and national commercials. As the hosts of Green Power Science, they share Fresnel lens and alternative energy ideas, … More About GREENPOWERSCIENCE »This is a simple emergency parabolic shape.