Energy in South Australia and trap in the deeper heat. Due to the low permeability of granite, the hot rocks must undergo hydraulic fracturing and be stimulated to allow a flow of water through the system to produce energy. This heat is slowly conducted to shallower rocks near the surface. Petratherm propose developing the geothermal energy in the more permeable sedimentary rocks that overlay the hot granite, a process called Heat Exchange Within Insulator (HEWI). While somewhat cooler, in many cases they do not require hydraulic fracturing. It is estimated that one percent of geothermal energy shallower than five kilometres below the earth's surface
This Is What the Truth Feels Like Tour already collaborated on the singles "Let Me Blow Ya Mind" and "Rich Girl". This setlist was obtained from the July 12, 2016, concert, held at the Xfinity Center in Mansfield, Massachusetts. It does not represent all concerts for the duration of the tour. This Is What the Truth Feels Like Tour The This Is What the Truth Feels Like Tour was the third solo concert tour by American singer-songwriter Gwen Stefani, in support of her third solo studio album, "This Is What the Truth Feels Like" (2016). It began on July 12, 2016, in Mansfield, Massachusetts at the Xfinity Center