Guest blog by SA Shelley: No doubt about it, the world runs on energy (and money). Nearly 80% of all the world’s energy is still provided by coal, oil and gas though this fossil fuel proportion of the energy mix is now shrinking and in just under 10 years, the world’s energy mix will look markedly different. I hope that in addition to coal, oil and gas the OWOE reader is familiar with some of the other large energy sources such as nuclear, wind, solar, hydro and wave. Here at OWOE we try to bring useful and relevant knowledge and ideas about energy to the reader, and one big potential and virtually zero carbon energy source that has been overlooked by a lot of people including the OWOE bloggers is geothermal energy. Well no more. After a bit of research this OWOE blogger has gone gung-ho for geo for good reason.