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
Live from the Underground from mainstream publications, the album received an average score of 78, based on 23 reviews. "Spin" named the album the eleventh best hip hop album of 2012. The album debuted at number five on the US "Billboard" 200, with first-week sales of 41,000 copies in the United States. As of August 2012, the album sold 83,000 copies in the United States. All tracks produced by Big K.R.I.T. Sample credits Credits for "Live from the Underground" adapted from AllMusic. Live from the Underground Live from the Underground is the debut studio album by American rapper and record producer Big K.R.I.T.. It