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 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 was released on June 5, 2012, by Cinematic Music Group and Def Jam Recordings. As one of the executive producers on the album, Big K.R.I.T. did the production work for the entirety of the project. The album was supported by four singles: "Money on the Floor", "I Got This", "Yeah Dat's Me" and "What U Mean". "Live from the Underground" received generally positive reviews from critics. At Metacritic, which assigns a normalized rating out of 100 to reviews