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
Notes from Underground underlying the gilded understanding of society is what he tells Liza will end up leading her down a calamitous path and ultimately destroy her. Where the Underground Man places himself in this messy view of society is rather complicated. He is very open about his irrational and spiteful interaction with the world, but he also admits that he understands the pleasure in "a doll to play with" or "a cup of tea with sugar in it" (these being symbols of a non-corrupted society). The important distinction here is that the Underground Man would lie awake grinding his teeth for months