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
That's What Love Is For That's What Love Is For "That's What Love Is For" is a 1991 Billboard Adult Contemporary chart #1 hit single and a Billboard Hot 100 top 10 single by Christian music singer Amy Grant. It was the third pop single off her 5x platinum selling album Heart in Motion and the only one from the album to be released both to secular and Christian radio. It was the second Christian radio single. In the United States the song was #1 for 3 weeks on Billboard's Adult Contemporary chart, spending 13 weeks in the Top 10 and 32 weeks on the