Word: rocks
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...debate has raged among the musical tribes, but the hip-hop vs. rock showdown is a diversion. "It's not fair to blame Jay-Z," Eavis told TIME, instead choosing to blame the weather in typically British fashion, "We've had three years of mud in succession, that was too much to bear, I almost gave up last time." With relentless rain the festival has become a particularly brutal test of endurance, but more fundamentally, Glastonbury has become a victim of its own success...
...answer may come from tapping the heat stored in rock strata at least 5 km below the surface in many parts of the world, including Europe, India, China, the U.S. and Australasia. A report by the Massachusetts Institute of Technology last year argued that by mid-century, this type of geothermal energy could supply 10% of America's power...
...Innamincka has some of the hottest rocks anywhere, and Geodynamics has spent $150 million drilling deep into them. The biggest and most advanced of some 40 companies seeking to capture Australia's underground heat, it aims to be the first to prove that deep-earth geothermal power is commercially viable. Geothermal is already a bit player in the power business: underground water heated by volcanoes is already used for heating and electricity generation in countries like Iceland and New Zealand. But supplies of natural hot water are limited. The new push is to mimic nature by creating artificial water-heating...
...Innamincka granites are buried under 3 km of sedimentary rock, which acts like a blanket on a bed. Heat is generated by the radioactive decay of elements in the granite, but it can't escape. Five km below the surface, the rocks' temperature...
...original plan was to pump water deep underground under high pressure, in order to crack the granites and create a path for the water to flow. Superheated by contact with the rock, the water would be pumped to the surface from a second well 1 km away, to create steam to drive a power turbine, then be pumped into the earth again...