Geothermal bet.

Semafor explores how the U.S. military is placing its bets on geothermal energy, a decades-old clean energy source that has never quite hit the limelight compared with wind and solar.

A concise yet thorough look at why the U.S. military believes it can meet with its clean energy goals with startups — Eavor Technologies, Fervo Energy and Sage Geosystems — without a large footprint.