Engineered geothermal systems (EGS) are based on a related principle, but they work even in parts of the world that are not volcanically active, by drilling thousands of metres underground to mimic the design of natural steam or hot-water reservoirs.

ECONOMIST: Inside story: Hot rocks and high hopes | The

Therefore, with a dramatic increase in drilling, oil field service companies are likely to be in demand, making them a hot investment.

FORBES: Peak Oil Plan

In Ithaca, NY, where we live, as elsewhere, horizontal drilling and hydraulic fracturing to gain access to shale natural gas (fracking) is a hot-button issue.

FORBES: Fracking: A Role for Universities