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 individuals. The Underground Man ridicules the type of enlightened self-interest (egoism, selfishness) that Chernyshevsky proposes as the foundation of Utopian society. The concept of cultural and legislative systems relying on this rational egoism is what the protagonist despises. The Underground embraces this ideal in praxis, and he seems to blame it for his current state of unhappiness. This type of rebellion is critical to later works of Dostoevsky as it is used by adolescents to validate their own existence, uniqueness and independence (see Dostoevsky's "The Adolescent"); rebellion in the face of the dysfunction and disorder of adult experience that one