Quote:
Originally Posted by NeilBlanchard
Geothermal heat is definition of dependable -- drill a deep hole anywhere you choose, and pump water down there, and you'll get steam to run a generator.
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Yes and no. First, in most of the country the hole has to be pretty darned deep, and drilling costs money. Second, you only get so much heat per unit time out of a hole (or an existing geothermal resource such as a hot spring). It comes down to heat flow rates, and rock isn't a good conductor of heat.