There's a drilling boom in California -- and it's not for oil or gas. With little help from the sky or the Sierra snowpack this year, farmers and ranchers are leaning heavily on pumping groundwater. Counties in the farm-rich Central Valley are issuing record numbers of permits for new wells. New studies show that as groundwater is drained from the huge aquifer there, it's putting more stress on the San Andreas Fault, triggering earthquakes.
Drought Drives Groundwater Drilling Frenzy
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