Geothermal
The drilled Kola Superdeep Borehole reached a depth of 7.62 miles in 1989. where the temperature at this depth and location reached 356 °F.



1 Quad = 1015 BTU (World energy usage is about 300 Quads/year, US is about 100 Quads/year in 1996.)





1 Quad = 1015 BTU (World energy usage is about 300 Quads/year, US is about 100 Quads/year in 1996.)


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