Hot dry rock geothermal energy as a separate state from that of the continuum of permeable rock—just as one would consider a completely closed faucet as distinct from one that is open to any degree, whether the flow be a trickle or a flood. In the same way, HDR technology should be regarded as totally distinct from EGS. A definitive book on HDR development, including a full account of the experiments at Fenton Hill, was published by Springer-Verlag in April 2012. Hot dry rock geothermal energy Hot dry rock (HDR) is an abundant source of geothermal energy available for use. A vast store of thermal
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