Hot dry rock geothermal energy Hot dry rock geothermal energy Hot dry rock (HDR) is an abundant source of geothermal energy available for use. A vast store of thermal energy is contained within hot - but essentially dry - impervious crystalline basement rocks found almost everywhere deep beneath the earth’s surface. A concept for the extraction of useful amounts of geothermal energy from HDR originated at the Los Alamos National Laboratory in 1970, and Laboratory researchers were awarded a U.S. patent covering it. Although often confused with the relatively limited hydrothermal resource already commercialized to a large extent, HDR geothermal energy is very different. Whereas
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